Database Users

No data connection after rooting to custom rom (Darky's v5.6)

I'm new to flashing custom roms and what not. I used odin and flashed everything to the point, csc, modem,pda,pit the rom works awesome but i cannot for the life of me connect to the internet. the 3g icon or h icon wont' show up. in the status it says my network type is gprs and i'm roaming and my mobile network state is disconnected.
I'm with fido, the phone is unlocked i have never had trouble with data or anything until i flashed to a custom rom.
Anyone have the same problem or suggest how to fix?

Data Conn. Issue
Hey mate,
Have you gone into 'Settings', 'Wireless and Networks', 'Mobile Networks' and then 'APN settings' and entered your appropriate settings?
That should fix it if you define the correct access point.
Alex

hey man, yeah i did all that stuff, went in there, found my carrier, put in all the apn settings i can find and still nothing. when i put data roaming on then i get data and the edge icon comes up.

Hey dude,
That sounds strange, flashing custom (or even release) roms is never a guarantee especially with weaknesses in the way that ODIN communicates with your phone, What I would do is Re-Flash your stock rom through ODIN then use the "quick" install method from Darkyy.
I am running 5.6 like you, and I had issues doing it through odin (I kept getting random FC's), additionally, the rom; if installed from CWM will keep your apns and apps e.t.c. along with many settings and configs from the base rom you're using before the flash.
That is the best advice I can give you.
Alex
My config is a follows:
I9000 International
16gb SDHC
500HZ Hardcore Kernel
Darkyy 5.6

Whats the process for reverting back to stock 2.1 eclair rom?

Did you keep a record of your firmware version before reflashing?
If not, you may have to ask someone on here what your base firmware was.
Are you familiar with using ODIN? (The software used for reflashing)
Alex

I am having same issue to...I used 5.4 from Darky and it works well...same with DocRom 4.0 works and the next 5.1/6.0 don't work.
Both Darkys and DocRom are based some JPX....which seem to be root cause..

I've have the same problem. Tried eveything but still didn't work. So went to Samsung Service Centre to have my SGS firmware refresh. I notice after the refreshed same issue of data com missing. Told them and they when into the SGS to select the telco operator setting selection. Now data com. working well. Anyone know the SGS handset setting code? I want to reload to Darky's v5.6 again.

hi folks
i have the same problem... my provider is a virtual provider in the network of our biggest provider here in austria. i was using doc's rom based on xwjpa firmeware and everything worked fine without enabled roaming options.
since doc's rom is based on the newer releases (xxjpx, xxjpy) i' only able to use data connection if i turn on roaming. it also shows me that i'm in a roaming network. i guess the cause are the xx firmwares. xw and xx are european firmwares but i do not know the differences between them. maybe someone has more information about the differences? currently i'm using xwjpa firmware because i don't want to use my phone with enabled roaming options.

hey um i'm having the same problem and thought replying here would be better than starting a new thread.
well i installed the rom without having any idea of what i was doing *stupid idea* so i didn't take note of my original firmware.
i didn't use odin to install the rom just clockwork recovery and the rom and everything installed fine except my data network. i can get signal, call, receive the only problem is i get no data transfer. any help much appreciated. if anything can someone help me step by step to reboot my phone to original?

just for future travellers
Sadly this isn't my own gem, but yeah. hold the power button down, wait for the shutdown menu, above the airplane mode there is a data network button, and it'll most likely say "de-activated" if nothing else has worked. Its ok to feel like a chump, I did after rehashing the hell out of this phone for a few days ( the wifes phone, my phone does exactly what its told. )
Anyway, yeah, this will probably be the reason for the lack of the icon "G", "3G" or "H" where it should be.
Dave.

[Q] i9505 LTE modem flash issue

Hi all,
I've had my phone locked on Tele2 (CRO) network which I needed to unlock to be able to use T-mobile SIM. I've used Odin 3.04 and followed the instructions to update modem to I9505XXUFNB9. I've managed to unlock the network this way and use my new SIM but the connection (both phone and mobile data) kept switching on and off constantly.
After that I've tried another firmware, namely I9505XXUFNDG for T-mobile but the problem now is that mobile is almost always off with no possiblity to connect and WiFi is blocked completely (security notification "Your device's security has blocked an action").
Basebands registered properly after every flash.
Phone is not rooted and me not being a power user would just love it to work as it was intended to
Followed the guide, all firmwares downloaded from here
Appreciate any help.

Might be onto something. After reading through this post seems I need to apply WiFi fix but I cannot tell which one to use for my phone (I9505XXUFNDG) as it's not posted. Kernel version 3.4.0-481100.
I've tried I9505_WiFi_FIX_MDM.tar and I9505_WiFi_FIX_MDF.tar but they just messed up the phone completely.
Thx a lot.

impaelas said:
Might be onto something. After reading through this post seems I need to apply WiFi fix but I cannot tell which one to use for my phone (I9505XXUFNDG) as it's not posted. Kernel version 3.4.0-481100.
I've tried I9505_WiFi_FIX_MDM.tar and I9505_WiFi_FIX_MDF.tar but they just messed up the phone completely.
Thx a lot.
Click to expand...
Click to collapse
Hi ,
you should flash the fix for the modem you have installed , try following:
Flash another modem from the list there
Now flash the modem wifi fix for that modem
If still in trouble re flash stock and start all over again.....

MAX 404 said:
Hi ,
you should flash the fix for the modem you have installed , try following:
Flash another modem from the list there
Now flash the modem wifi fix for that modem
If still in trouble re flash stock and start all over again.....
Click to expand...
Click to collapse
Thx, did just that and now it works properly.
Much obliged.

a problem started to show recently; when i select LTE/WCDMA/GSM for auto connect network mode when the mode switches due to signal availability it doesn't get reconnected. i.e. while under LTE it works fine but if i move and get out of reach it should automatically switch to slower network which it doesn't. this works fine if i select WCDMA/GSM then the switches are fine but LTE is not available under this.
one more thing i noticed since i'+ve flashed the phone is that the upper part of the phone gets very very hot (a lot more than before). since the flash i've also had to replace a microSD card which died within weeks (not necessarily connected but worth noting).
any suggestions welcome.
Android: 4.4.2
Baseband: I9505XXUFNB9
Kernel: 3.4.0-481100

Data modem not functioning after clean wipe / flash

I have this strange problem where sometimes my modem does not work after a clean flash. Usually just making sure the data network preference is set to LTE solves the issue, and after 10 min or less the phone picks up the band. But I've just done a clean flash teamUB 1/11 and its been 24 hours with no data connection. This same build worked fine for this same phone a week ago, but the 1/19 broke the phone so I had to do a clean wipe and go back to 1/11.
I've played with data roaming options in CDMA roaming mode, set to domestic roaming, national roaming. Still no data
Any advice?
This is for a 900P (sprint) - Note that I am on CREDO (uses Sprint network)
EDIT - FIXED YAY!!! FULL LTE WORKING GREAT!
Reflashing the NKD modem for 5.0 +, with advice here:
http://forum.xda-developers.com/showpost.php?p=58338773&postcount=12
Changing APN/Mobile settings to recommended here:
http://forum.cyanogenmod.org/topic/84151-credo-mobile-4g/#entry430448

Iriez said:
I have this strange problem where sometimes my modem does not work after a clean flash. Usually just making sure the data network preference is set to LTE solves the issue, and after 10 min or less the phone picks up the band. But I've just done a clean flash teamUB 1/11 and its been 24 hours with no data connection. This same build worked fine for this same phone a week ago, but the 1/19 broke the phone so I had to do a clean wipe and go back to 1/11.
I've played with data roaming options in CDMA roaming mode, set to domestic roaming, national roaming. Still no data
Any advice?
This is for a 900P (sprint)
Click to expand...
Click to collapse
Since last time / last week have you flashed any new modems?

lingowistico said:
Since last time / last week have you flashed any new modems?
Click to expand...
Click to collapse
The issue started when I was forced to wipe my system data and do a clean install in order to get the phone functional after boot loop from 1/19 update. so yes, I would assume that the modem built into the 1/11 update I rolled back to (clean install) contained the modem. But, as stated, the 1/11 build was working fine for me before, and not now.
Is there a way to just update the modem itself on this build/phone? I've been wondering about that and wanted to try it if possible.

Iriez said:
The issue started when I was forced to wipe my system data and do a clean install in order to get the phone functional after boot loop from 1/19 update. so yes, I would assume that the modem built into the 1/11 update I rolled back to (clean install) contained the modem. But, as stated, the 1/11 build was working fine for me before, and not now.
Is there a way to just update the modem itself on this build/phone? I've been wondering about that and wanted to try it if possible.
Click to expand...
Click to collapse
There is no modem included in TeamUB's roms.
First thing's first, what model are you using? Go to signature settings and write your model there, this way whoever is helping you they will know what they're dealing with.

lingowistico said:
There is no modem included in TeamUB's roms.
First thing's first, what model are you using? Go to signature settings and write your model there, this way whoever is helping you they will know what they're dealing with.
Click to expand...
Click to collapse
Sorry, I wrote 900P in the first post, I thought that was enough information. I've updated my signature to contain more information.
thanks

Iriez said:
Sorry, I wrote 900P in the first post, I thought that was enough information. I've updated my signature to contain more information.
thanks
Click to expand...
Click to collapse
No need to say sorry man, just mean it makes it easier. Haha you're signature says 900O lol.
1 Install Samsung USB driver for mobile phones
2 Download the NE5 modem one click flasher here
3 Put your phone into download mode (Turn off the device, press Volume Down, Home and Power Buttons simultaneously, Once you see the warning message, release all buttons, Press Volume Up to enter download mode, Now your device should be in download mode)
4 Run the file from #2 and flash modem (if NE5 doesn't help try the other ones).
I don't think it's a modem problem though. IMO it's either the rom or the operator..

lingowistico said:
No need to say sorry man, just mean it makes it easier. Haha you're signature says 900O lol.
1 Install Samsung USB driver for mobile phones
2 Download the NE5 modem one click flasher here
3 Put your phone into download mode (Turn off the device, press Volume Down, Home and Power Buttons simultaneously, Once you see the warning message, release all buttons, Press Volume Up to enter download mode, Now your device should be in download mode)
4 Run the file from #2 and flash modem (if NE5 doesn't help try the other ones).
I don't think it's a modem problem though. IMO it's either the rom or the operator..
Click to expand...
Click to collapse
The NE5 throws a <OSM> MD5 hash value is invalid error. I flashed the ND2 version and no immediate data connection, but from past experience it can take a little while for the modem to sync. No idea what causes the delay, but everytime i flash a new rom it can take sometimes up to 30min before it gets a data connection. Been 15min no connection yet.
Couldnt find a mirror anywhere of that NE5 one click flasher. Know of any other hosts? i googled to no avail.

Iriez said:
The NE5 throws a <OSM> MD5 hash value is invalid error. I flashed the ND2 version and no immediate data connection, but from past experience it can take a little while for the modem to sync. No idea what causes the delay, but everytime i flash a new rom it can take sometimes up to 30min before it gets a data connection. Been 15min no connection yet.
Couldnt find a mirror anywhere of that NE5 one click flasher. Know of any other hosts? i googled to no avail.
Click to expand...
Click to collapse
Try downloading the tar here and flash it in Odin.

lingowistico said:
Try downloading the tar here and flash it in Odin.
Click to expand...
Click to collapse
Update:
I have restored a old backup to kitkat, modem working fine, instant connection. Then I did a system wipe, clean flash to cyanogenmod 1/20 update released yesterday.....no modem. Restored backup again to kitkat, then did a dirty flash to 1/20 cyanogenmod.....no modem.
I think the issue is 5.0 itself. The issue is so random, I do not know how to troubleshoot it. I've installed maybe a dozen CM's so far, and its been a coin toss whether the modem works after install. Sometimes it syncs up after a few min, and sometimes never. its really strange because I had the modem working fine on TeamUB from late december, through 3 or 4 updates until 1/19 boot looped it. Now after that nothing has gotten the data back on other than restoring to kitkat.
When i did the clean install to cyanogenmod, on the startup process where it says 'waiting to activate cellular service' it gets stuck there and never activates the data.
Also, when trying to flash the NE5 tar md5 you linked to, I get md5 error! Binary is invalid. Im supposed to use AP, yes?
EDIT - Changed preferred network type to 3G and after a few reboots got data! Going to change back to LTE now and give it some time to see if i can get it to sync up.

Iriez said:
Update:
I have restored a old backup to kitkat, modem working fine, instant connection. Then I did a system wipe, clean flash to cyanogenmod 1/20 update released yesterday.....no modem. Restored backup again to kitkat, then did a dirty flash to 1/20 cyanogenmod.....no modem.
I think the issue is 5.0 itself. The issue is so random, I do not know how to troubleshoot it. I've installed maybe a dozen CM's so far, and its been a coin toss whether the modem works after install. Sometimes it syncs up after a few min, and sometimes never. its really strange because I had the modem working fine on TeamUB from late december, through 3 or 4 updates until 1/19 boot looped it. Now after that nothing has gotten the data back on other than restoring to kitkat.
When i did the clean install to cyanogenmod, on the startup process where it says 'waiting to activate cellular service' it gets stuck there and never activates the data.
Also, when trying to flash the NE5 tar md5 you linked to, I get md5 error! Binary is invalid. Im supposed to use AP, yes?
EDIT - Changed preferred network type to 3G and after a few reboots got data! Going to change back to LTE now and give it some time to see if i can get it to sync up.
Click to expand...
Click to collapse
No luck leaving it on LTE. When I switch back to 3g I can get a connection, LTE set in preferences I get no connection, not even 3g. I've been testing around the city and at my home, where I can always pickup a LTE connection from past experience.
It seems that the LTE protocol within 5.0 is buggy for my situation. If it works, it seems to work fine, but when it doesnt work, it never works. So its either glass is full or empty

Iriez said:
No luck leaving it on LTE. When I switch back to 3g I can get a connection, LTE set in preferences I get no connection, not even 3g. I've been testing around the city and at my home, where I can always pickup a LTE connection from past experience.
It seems that the LTE protocol within 5.0 is buggy for my situation. If it works, it seems to work fine, but when it doesnt work, it never works. So its either glass is full or empty
Click to expand...
Click to collapse
There are two versions of labels in Odin. The "normal" says "phone" the one I don't like says "CP". You have the Odin I don't like lol, so yours says "CP". That's where you put the modem. "AP" is for firmware/roms only.
Try these two modems, which I found on this page, NK4 for 4.4 while NKD is for 5.0.
Try Ktoosez kernel and also check your Apn settings, it's supposed to be optimised for CDMA phones and might help you.

lingowistico said:
There are two versions of labels in Odin. The "normal" says "phone" the one I don't like says "CP". You have the Odin I don't like lol, so yours says "CP". That's where you put the modem. "AP" is for firmware/roms only.
Try these two modems, which I found on this page, NK4 for 4.4 while NKD is for 5.0.
Try Ktoosez kernel and also check your Apn settings, it's supposed to be optimised for CDMA phones and might help you.
Click to expand...
Click to collapse
Wahooo! Flashing NKD with odin and messing with the APN's has fixed it!!! You rock!
I took a look at ktoosez kernel, what exactly would it bring to me? Always interested in new tools......

Iriez said:
Wahooo! Flashing NKD with odin and messing with the APN's has fixed it!!! You rock!
I took a look at ktoosez kernel, what exactly would it bring to me? Always interested in new tools......
Click to expand...
Click to collapse
Congrats! I'm glad it worked out Ktoonsez mentioned in the CM12 thread that his kernel was optimized for sprint/verizon phones in some way, don't remember what though :silly:

Network not registered issue

Hi Guys,
I am writing this Thread believing that I will get a solution as Yota company has not provided any solution after 15 days trouble shooting. I just brought the phone from Russian seller through eBay.com to India and after 2 months of fight from the local customs office I just got my phone. I was very happy and was floating in air to have the first dual screen phone in my hand. The phone was flawless with dual screen was working awesome. The phone came with lollipop update. I switched on the phone with out inserting the simcard, the phone prompted for a small 350 MB update and I just update the phone. Then I just inserted the Simcard after which i started facing issue. The issue was the phone is able to read and shoe the service provider name but there was no network signal and it was showing only emergency calls. When i tried to make calls it showed network no registered. I tried with different simcard which resulted in the same issue. I though it might be a simcard issue and checked with my old phone but there was no simcard issue. So i just contacted the Yota tech team through mail to help me on this issue. They asked me do some basic troubleshooting but there was no use after 15 days they asked me to ship the phone to nearest service center which is in Russia. The issue is to and back from Russia customs will cost me the price of 2 Yotaphone fist generation phone price. So I through of resolving this issue myself and researched in online. I found that Samsung phones were also facing the same issue after update and tried all the solutions given in internet but there was no use. Finally there was a solution asking to root the phone and install the ariza patch which would solve the issue. I just rooted my phone and when I installed the ariza it showed it was not compilable for yotaphone 2. I just searched in XDA forums and could not find anyone reporting the similar issue with a solution. So I through of creating new thread in hope of getting a solution in this issue. Please help me in this issue by creating a patch or any solution which will me help me out of this. I am not able to use the phone as the basic call function is not even working reset the phone is a heaven.:crying::crying::crying:

bharath9962 said:
Hi Guys,
I am writing this Thread believing that I will get a solution as Yota company has not provided any solution after 15 days trouble shooting. I just brought the phone from Russian seller through eBay.com to India and after 2 months of fight from the local customs office I just got my phone. I was very happy and was floating in air to have the first dual screen phone in my hand. The phone was flawless with dual screen was working awesome. The phone came with lollipop update. I switched on the phone with out inserting the simcard, the phone prompted for a small 350 MB update and I just update the phone. Then I just inserted the Simcard after which i started facing issue. The issue was the phone is able to read and shoe the service provider name but there was no network signal and it was showing only emergency calls. When i tried to make calls it showed network no registered. I tried with different simcard which resulted in the same issue. I though it might be a simcard issue and checked with my old phone but there was no simcard issue. So i just contacted the Yota tech team through mail to help me on this issue. They asked me do some basic troubleshooting but there was no use after 15 days they asked me to ship the phone to nearest service center which is in Russia. The issue is to and back from Russia customs will cost me the price of 2 Yotaphone fist generation phone price. So I through of resolving this issue myself and researched in online. I found that Samsung phones were also facing the same issue after update and tried all the solutions given in internet but there was no use. Finally there was a solution asking to root the phone and install the ariza patch which would solve the issue. I just rooted my phone and when I installed the ariza it showed it was not compilable for yotaphone 2. I just searched in XDA forums and could not find anyone reporting the similar issue with a solution. So I through of creating new thread in hope of getting a solution in this issue. Please help me in this issue by creating a patch or any solution which will me help me out of this. I am not able to use the phone as the basic call function is not even working reset the phone is a heaven.:crying::crying::crying:
Click to expand...
Click to collapse
Do you still have this problem?
I wasn't sure at first, I thought it was my sim card, but I have tried 2 different networks sims and they both get no signal in my Yotaphone 2...
The network's name does appear, so the sim must be being read somewhat, but I always get no signal.
I literally have no idea what to do.
I too turned the phone on without a simcard, flashed the RU latest rom, flashed TWRP, rooted it etc, surely that has nothing to do with it...?

@bharath9962 ! I fixed it!
I have no idea why this happened, and I spent a few hours trying to fix it, very angry. I downgraded to 4.4 to see if it would help, put back the native China rom that came with my phone (accidentally deleted my backup too...)
I bought a new sim card just for this phone because the old one did not 'work'.
This is not a popular phone so it's hard to find information, anyway... I'm very relieved now. I can only imagine you gave up...
I found the answer here - thewichitacomputerguy.com/blog/how-i-fixed-your-sim-card-does-not-allow-connection-network-g1
1. Open the phone dialer
2. Enter: *#*#4636#*#* (Once entered, you will be taken directly to a "Testing" page) [4636 spells INFO]
3. Tap Phone Information
4. Scroll to the bottom of the screen and you should see a button that says radio off. Hit this button and when it reads radio on Hit it again to turn the radio back on. <-- (Not a Typo)
I rebooted and waited a few seconds, no signal. I turned on airplane mode, turned it off, and it worked!
Now I can go back to RU 1.99 and reinstall all my stuff...

cbcbcvcc said:
@bharath9962 ! I fixed it!
I have no idea why this happened, and I spent a few hours trying to fix it, very angry. I downgraded to 4.4 to see if it would help, put back the native China rom that came with my phone (accidentally deleted my backup too...)
I bought a new sim card just for this phone because the old one did not 'work'.
This is not a popular phone so it's hard to find information, anyway... I'm very relieved now. I can only imagine you gave up...
I found the answer here - thewichitacomputerguy.com/blog/how-i-fixed-your-sim-card-does-not-allow-connection-network-g1
1. Open the phone dialer
2. Enter: *#*#4636#*#* (Once entered, you will be taken directly to a "Testing" page) [4636 spells INFO]
3. Tap Phone Information
4. Scroll to the bottom of the screen and you should see a button that says radio off. Hit this button and when it reads radio on Hit it again to turn the radio back on. <-- (Not a Typo)
I rebooted and waited a few seconds, no signal. I turned on airplane mode, turned it off, and it worked!
Now I can go back to RU 1.99 and reinstall all my stuff...
Click to expand...
Click to collapse
@cbcbcvcc may i know which country you are and what type of sim your using. So that i could check my issue accordingly.. And thanks for your reply tp my post as i waa waiting for some one to help for the last 3 months... When hope was vanishing you just showed up.. This help means a lot to me

bharath9962 said:
@cbcbcvcc may i know which country you are and what type of sim your using. So that i could check my issue accordingly.. And thanks for your reply tp my post as i waa waiting for some one to help for the last 3 months... When hope was vanishing you just showed up.. This help means a lot to me
Click to expand...
Click to collapse
My country is in Asia but I believe this does not matter - the problem was that somehow the radio (cell phone function) was 'off'/glitched, and had to be turned on+off to make the phone function again. Using a different country's sim card would not fix this problem.
As I wrote above, we both share the fact that we first turned our phones on with no sim, and updated. Maybe just a coincidence...
Just try the guide and please let me know if it is fixed!

cbcbcvcc said:
My country is in Asia but I believe this does not matter - the problem was that somehow the radio (cell phone function) was 'off'/glitched, and had to be turned on+off to make the phone function again. Using a different country's sim card would not fix this problem.
As I wrote above, we both share the fact that we first turned our phones on with no sim, and updated. Maybe just a coincidence...
Just try the guide and please let me know if it is fixed!
Click to expand...
Click to collapse
Hi cbcbcvcc,
Tried the guide but still no use, I also downgraded the ROM and tried the guide still no use. This is hurting me so bad.. Do you have any other way to resolve the issue please share with me.

No SIM CARD
Hi to All,
suddenly after I did a reset and change the sim card, the Yotaphone is no more recognize the sim card.
I try to install a new rom...nothing
I try to install the Kitkat rom...nothing
I try the method suggested here to use the code *#*#46..... nothing
any help please

Please I have tried the guidelines but the radio refuse to ON. I click on it but not never respond

Hello, I have update my Yotaphone and now I receive WCDMA, but no gsm/edge signal .
I change the Rom (lollipop,kitkat,, HK rom, EU Rom)but I have always the problem :
I receive H, H+. But no Edge/GSM...
Can you help me.

[SOLVED]
Fix for Yotaphone 2 YD206 from China
If you already flashed the phone to latest EU 5.0, you can skip 1-5
1. download via FTP: fw.ydevices.com/YotaPhone2/YotaPhoneFlasher/yotaphone2_flasher.exe and install
2. run flasher and download latest EU rom (2 - 5- 7)
3. turn off the phone and turn it on while holding volume down - this will boot the phone in "downloading..." mode
4. in the flasher press 1 (Flash the cellphone)
5. the phone is now on 5.0.0-EU1.1.124b and 2G is not working at all and 3G is connecting only to 2100 MHz (on my cell network)
6. download via FTP: fw.ydevices.com/YotaPhone2/Firmwares/CN/4.4.3-S01-003-CN1.0.3.32a.zip
7. unzip the file and copy \radio to c:\program files (x86)\yotaphone_flasher
8. run cmd and go to c:\program files (x86)\yotaphone_flasher
9. repeat step 3.
10. run next lines:
fastboot flash modem radio\NON-HLOS.bin
fastboot flash sbl1 radio\sbl1.mbn
fastboot flash rpm radio\rpm.mbn
fastboot flash tz radio\tz.mbn
11. reboot the phone and enjoy 2G and strong 3G signal
manu3556 said:
Hello, I have update my Yotaphone and now I receive WCDMA, but no gsm/edge signal .
I change the Rom (lollipop,kitkat,, HK rom, EU Rom)but I have always the problem :
I receive H, H+. But no Edge/GSM...
Can you help me.
Click to expand...
Click to collapse

good job deepmnd
thanks :good::good::good:

deepmnd said:
Fix for Yotaphone 2 YD206 from China
If you already flashed the phone to latest EU 5.0, you can skip 1-5
1. download via FTP: fw.ydevices.com/YotaPhone2/YotaPhoneFlasher/yotaphone2_flasher.exe and install
2. run flasher and download latest EU rom (2 - 5- 7)
3. turn off the phone and turn it on while holding volume down - this will boot the phone in "downloading..." mode
4. in the flasher press 1 (Flash the cellphone)
5. the phone is now on 5.0.0-EU1.1.124b and 2G is not working at all and 3G is connecting only to 2100 MHz (on my cell network)
6. download via FTP: fw.ydevices.com/YotaPhone2/Firmwares/CN/4.4.3-S01-003-CN1.0.3.32a.zip
7. unzip the file and copy \radio to c:\program files (x86)\yotaphone_flasher
8. run cmd and go to c:\program files (x86)\yotaphone_flasher
9. repeat step 3.
10. run next lines:
fastboot flash modem radio\NON-HLOS.bin
fastboot flash sbl1 radio\sbl1.mbn
fastboot flash rpm radio\rpm.mbn
fastboot flash tz radio\tz.mbn
11. reboot the phone and enjoy 2G and strong 3G signal
Click to expand...
Click to collapse
Hello!
I try to figure out what you did but I get stucked in number 10.
Actually I flashed my Yotaphone with the chinese radio the first time, but I don't get good connectivity.
Anyways I try to do what you wrote, but when I tipe the first line (first fastboot command), cmd keep saying waiting for the device... maybe is that I'm impatient but nothing happens.
I try other USB ports and nothing works...
So actually I don't know if I'm doing it right or if I have to wait for a longer period of time (10 minutes or more).
Any help would much appreciated.
Cheers!

Hi there,
you don't have ADB drivers installed. Google for "universal adb driver" and install. There is driver included with yota 5.0 firmware (C:\Program Files (x86)\yotaphone_flasher\Driver\Google), but any other adb driver should work as well.
And use original yota usb cable!!!
It shouldn't take more that a few seconds for those commands to execute.
MDans said:
Hello!
I try to figure out what you did but I get stucked in number 10.
Actually I flashed my Yotaphone with the chinese radio the first time, but I don't get good connectivity.
Anyways I try to do what you wrote, but when I tipe the first line (first fastboot command), cmd keep saying waiting for the device... maybe is that I'm impatient but nothing happens.
I try other USB ports and nothing works...
So actually I don't know if I'm doing it right or if I have to wait for a longer period of time (10 minutes or more).
Any help would much appreciated.
Cheers!
Click to expand...
Click to collapse

Had the same problem
Hi all, I had the same problem when I flashed russian firmware (YD201) over my phone which originally had honkong firmware (YD206).
I can inform that for me it also worked to flash the Chinese firware with yotaflasher.
However, when I tried to only flash the radio, it seemed it did not work. So I flashed the complete chinese kitkat firmware with yotaflasher and then afterward just removed/renamed the radio folder when flashing the newest russian lollipop firmware. Everything working great now, even was able to do some ota's without any problems since the ota's did not update anything of the radio img's.
And indeed you first need to make sure that you have the fastboot drivers installed and your device gets recognized as fastboot device by your PC.
You can test this by doing "fastboot devices". If you device turns up there as a fastboot devices, then the drivers and connection from pc to phone are ok.
Good Luck!

Thank you deepmnd and tomgaga.
Actually I had to activate developer options... And then reinstall the ADB cause, aparently I had it but it didn't work.
After that the instructions worked perfectly, but I still have network issues.
I don't know if it is because I have a MVNO (Mobile virtual network operator) and the phone has to change between the networks ( the one that provides the network and the MVNO).
I think that when it changes from one net to the other is when I lose connectivity and sometimes I have to search the network and choose it manually.
So this problem actually happened to me and the solution was to activate Roaming services (but I dont' know if is actually the same problem).
Anyways I can see that I connect to EDGE, HSPA/HSDPA and LTE.
For sure there is a way to monitor the network and check wich ones works.
Another guess is that being a phone for the chinese market, and the lack of the 900mhz band is causing this ¿?
So at the moment I'm losing signal just by walking on the street and I live in a big city. It seems that LTE and H works fine but I don't have a a way to assure this.
When I will have a spare time I will try to reflash the phone with the instructions deepmnd provided and see if it will work.
Thank you for your help!
Any advice will be appreciated!!
Update:
I try tomgaga approach I will test it just to see if is the network or my provider

Does anybody know which bands different firmwares support?
Reception is incredibly bad in my case (206 flashed with EU firmware).
It'd be nice if somebody has any info on unlocking different bands for yotaphone2.

kbal said:
Does anybody know which bands different firmwares support?
Reception is incredibly bad in my case (206 flashed with EU firmware).
It'd be nice if somebody has any info on unlocking different bands for yotaphone2.
Click to expand...
Click to collapse
Here you have the bands
https://www.frequencycheck.com/compare-devices/qkjseR/yota-yotaphone-2-yd201/yota-yotaphone-2-yd206
I have the same problem as you, I will try this weekend to downgrade to the older chinese rom and check if the reception get better.
And if then to the latest RU rom.

MDans said:
Here you have the bands
https://www.frequencycheck.com/compare-devices/qkjseR/yota-yotaphone-2-yd201/yota-yotaphone-2-yd206
I have the same problem as you, I will try this weekend to downgrade to the older chinese rom and check if the reception get better.
And if then to the latest RU rom.
Click to expand...
Click to collapse
Thanks for that, it helps a lot to clear the situation regarding the two models.
Now, taking in account deepmnd´s solution above, would it be possible to find those missing bands from the original 206 which are not available to the updated (and then international, 201-) version and add them individually, file by file via the fastboot flashing?

I followed deepmnd's instructions, and my phone now connects to GSM/EDGE, which was not possible before using the EU Radio (latest EU rom). Thanks for this!
Unfortunately it now preferably (!) connects to EDGE, although the LTE/WCDMA-Option is prioritized. I can force the phone to connect to WCDMA by using the WCDMA-only-option, but in this case it does not commit a fallback to EDGE if 3G is missing and I have no connectivity at all, unless I change the band-options and force a connect to EDGE. I'd like it to switch between the bands automatically, as my YD201 did without problems (in Germany).
Any hints to solve this problem?
Thanks in advance, Knut

deepmnd said:
Fix for Yotaphone 2 YD206 from China
If you already flashed the phone to latest EU 5.0, you can skip 1-5
1. download via FTP: fw.ydevices.com/YotaPhone2/YotaPhoneFlasher/yotaphone2_flasher.exe and install
2. run flasher and download latest EU rom (2 - 5- 7)
3. turn off the phone and turn it on while holding volume down - this will boot the phone in "downloading..." mode
4. in the flasher press 1 (Flash the cellphone)
5. the phone is now on 5.0.0-EU1.1.124b and 2G is not working at all and 3G is connecting only to 2100 MHz (on my cell network)
6. download via FTP: fw.ydevices.com/YotaPhone2/Firmwares/CN/4.4.3-S01-003-CN1.0.3.32a.zip
7. unzip the file and copy \radio to c:\program files (x86)\yotaphone_flasher
8. run cmd and go to c:\program files (x86)\yotaphone_flasher
9. repeat step 3.
10. run next lines:
fastboot flash modem radio\NON-HLOS.bin
fastboot flash sbl1 radio\sbl1.mbn
fastboot flash rpm radio\rpm.mbn
fastboot flash tz radio\tz.mbn
11. reboot the phone and enjoy 2G and strong 3G signal
Click to expand...
Click to collapse
Thank you! I had missed calls and did not know what caused them. Then I noticed this happened when I was not on LTE network but on WCDMA or 2G network. And this seems to have solved the issue for me as well.

[N910S] got it to work! Exynos Korean model, Eng-only custom ROM, no bloatware!

OK, *FIRST TIME POSTER HERE* so please excuse any unintentional ignorance of rules or etiquette.
I'm just super excited to get this phone working the way I like it, and it's all thanks to xda so I was moved to create an account to express my thanks AND hopefully help a few people back.
How? Well after reading through pretty much everything I could find on the N910S here and elsewhere, it seems that no-one (yet?) has been able to confirm a working mod that meets the following:
1. N910S Exynos Korean version
2. Some kind of custom English only ROM that removes the Korean characters from keypad and other network-apps
3. Removed bloatware
4. Easy-to-follow, how-to guide
Seems there were quite a few ppl who wanted the same thing so I just want to let you know what I did to get it working.
*PLEASE NOTE* Everything contained in this summary was found through over a week of tedious reading, research, trial & error. BUT in the end all the necessary information was contained, or linked to, in xda forums. It's just that all the relevant information and files were scattered over many different threads and topics. I'm just collating it all here to hopefully make it easier for the next person to find.
Background info: I'm technically competent but relatively new to phone modding - I've only rooted my HTC E8 before this to remove bloatware. This is my second project. I live in HK and started with a completely stock OEM Note4 N910SKSU2DPK2 after a factory reset. I then did the steps below in order (not including many failed attempts and re-starts, of course) These are just the broadstrokes of what I did, if you need to know how to do each step in detail then please search the forum. It's quite clear and there's no need for me to repeat it here anyway
As it's my first post and I'm in a rush to leave the house soon, I have not bothered with screenshots or links - I'm happy to provide if someone can tell me if the preferred method is link to the thread where the info was found, or you just want a link to the files I used. Again, they were all found through links in threads on xda anyway but I'll have to spend some time to find them again as I didn't bookmark them. Also, if you want the files someone will have to tell me how to upload them here. The filenames/packages are given in [brackets] so maybe you can just search for them?
0. Reminder to backup your phone and data first!
1. Root - was really easy using CF AutoRoot [CF-Auto-Root-trelteskt-trelteskt-smn910s] Just download to your PC and package includes Odin, which for first-timers is the official Samsung software used to flash to your phone.
2. Download:
- ClockWorkMod [n910s-cwm-recovery-6.0.5.1(1113).tar]
- SuperSU [SuperSU-v2.79-201612051815.zip]
- C Mod ROM [C_ROM_N910s.v2HNY.zip] (the site is Korean-based but google translate of the page was enough for a non-Korean like myself)
- N910S DPK2 modem file [N910S-20170114T050808Z.zip] The original thread had links to every modem variant they knew of, so should work with other S/L/K variants BUT of course I haven't tried them.
3. Copy files for SuperSU, CMod ROM, and DPK2 modem onto an external SD card and insert into your phone.
4. Put your phone into Download Mode (from power-off state, hold Vol Down + Home + Power)
5. Run Odin on your PC, connect phone. On Odin, click <AP> and select CWM file. Do not check or modify any other options. Click <Start> to flash CWM recovery to your phone.
6. Once it's done, disconnect from PC, and restart your phone into the new custom recovery mode (from power-off state, hold Vol Up + Home + Power)
7. Choose Install from zip and select the SuperSU file from your ext SD card. (I think this step may not be strictly necessary as it's part of CF AutoRoot, but SuperSU is always handy to have anyway)
8. Reboot into Recovery mode again (available in Advanced menu)
9. Install zip - now choose the CMod ROM file. Reboot into system and have a look around the new UI. It was at this stage that I noticed two things: my HK carrier SIM was not recognised, and as the ROM boasts some Note 5 features the Always On Display function would cause my Note 4 to not be able to wake up once the screen was turned off (manually or via time-out). I had to pull out the battery, restart phone, go straight into Settings -> Display and turn off the Always On Display functionality.
10. To fix the SIM card not recognised, reboot into Recovery Mode again and Install zip - choose the DPK2 modem file (or whichever version your phone's modem is). Restart phone, wait a few minutes and SIM should now work.
*ONE REMAINING ISSUE* Even tho my SIM is 4G/LTE, it seems to be connecting at HSUPA only. Could be reception, I'll check later. But I believe there's a way to select different LTE bands through secret codes or menu, not sure but I'll try that as well later and update if it works.
That's it - hope it helps! Thanks for reading, and don't forget I'm new to this AND a first time poster so be kind in comments/questions please

Update and question
Kookinen said:
*ONE REMAINING ISSUE* Even tho my SIM is 4G/LTE, it seems to be connecting at HSUPA only. Could be reception, I'll check later. But I believe there's a way to select different LTE bands through secret codes or menu, not sure but I'll try that as well later and update if it works.
Click to expand...
Click to collapse
So by following steps in this thread https://forum.xda-developers.com/note-4/help/note-4-sm-n910s-sk-telecom-issues-t2929571/page2 for SKT, I was able to change to LTE Band 3 or 7 (which is what my sim provider offers) and get an LTE signal for data, BUT then I lose voice call functionality. If I choose Band 3 Preferred, it says band changed success, but just connects via HSUPA and I get voice, but no LTE (just like before, or if I choose Automatic)
Can anyone please help me figure this out? How can I get voice AND LTE? Many thanks in advance!
PS - also after I reflashed my modem.bin the baseband changed from N910SKSU2DPK2 to N910SKSU0DPK2. I don't know what this means nor if it has anything to do with the problem I've described above? Can anyone help to explain? Thanks...

Kookinen said:
So by following steps in this thread https://forum.xda-developers.com/note-4/help/note-4-sm-n910s-sk-telecom-issues-t2929571/page2 for SKT, I was able to change to LTE Band 3 or 7 (which is what my sim provider offers) and get an LTE signal for data, BUT then I lose voice call functionality. If I choose Band 3 Preferred, it says band changed success, but just connects via HSUPA and I get voice, but no LTE (just like before, or if I choose Automatic)
Can anyone please help me figure this out? How can I get voice AND LTE? Many thanks in advance!
PS - also after I reflashed my modem.bin the baseband changed from N910SKSU2DPK2 to N910SKSU0DPK2. I don't know what this means nor if it has anything to do with the problem I've described above? Can anyone help to explain? Thanks...
Click to expand...
Click to collapse
Band 3 and 7 are supposed to stick with default settings. I tried it once during my trip to Malaysia and it worked flawlessly. Any chance you might want to contact your carrier?

The trick to switch from 4G-3G-4G works. ATT band 5 preferred

Kookinen said:
*ONE REMAINING ISSUE* Even tho my SIM is 4G/LTE, it seems to be connecting at HSUPA only. Could be reception, I'll check later. But I believe there's a way to select different LTE bands through secret codes or menu, not sure but I'll try that as well later and update if it works.
Click to expand...
Click to collapse
Have you tried switching to 3g only, then switching it back to 4g when available in your phone setting??
I had similar issue with 4g and apparently, this strangely simple trick solved my problem.
Anyway, I tried to download the ROM from the Achonapp but took me ages and I couldn't flash it either. May I know where you got the ROM from?

nosediger said:
Have you tried switching to 3g only, then switching it back to 4g when available in your phone setting??
I had similar issue with 4g and apparently, this strangely simple trick solved my problem.
Anyway, I tried to download the ROM from the Achonapp but took me ages and I couldn't flash it either. May I know where you got the ROM from?
Click to expand...
Click to collapse
Tried your suggestion but now it shows No Service
*update* actually I think your "trick" works... After switching to 3G only, it wouldn't switch back to 4G and showed No Service. I rebooted the phone with a different sim and after a few minutes, it automatically connected to 4G AND I now have voice as well! So, all is working properly now and I'm a happy camper. Reboot with the original sim and still works and connects to 4G. So I think you're right it just needed to be "forced" to select 4G preferred. Thanks for the tip!
Yeah I got it from achonapp as well and it took a while - I think I left it going overnight. But the ROM did work for me. If anyone wants the file direct I'm happy to put it up on my google drive if it's not against forum rules etc.
But since then I've switched to miui8 which is also working pretty much flawlessly as daily ROM, but I haven't tested every single little feature of course. If you wanna try it - https://forum.xda-developers.com/showpost.php?p=70596588&postcount=797