Database Users

Vodafone V1640 ROM error

Not being a pc/phone buff I wondered if any of you guys can help me?
I bought a Vodafone V1640 that had O2 software on it. Firstly is this ok? Should it have had Vodafone software on it? Second, I sold the phone on eBay beause it did not match my needs or critera and now the person that bought it is saying there is a ROM error showing and that I had originally bought a duff phone. This I cannot understand, as when I received the phone, I charged it and made sure that it was in perfect working ordered. This was over a peroid of about 2-3 hours and no error showed on the phone what so ever. It actually came sealed as if it had come straight from Vodafone as an upgrade maybe.
I cannot understand why this error messgae is now showing and upon asking an IT collegue at work he has suggested that this person had maybe tried to load new software on to the phone therefore the ROM error being apparent.
Does anyone have any idea why the phone may only now be showing this error? I can assure you all that I did nothing to the phone as it was only out of the box for a few hours before I decided that it wasn't for me.
Thanks in advance for anyone that can help.
:roll:

what error is showing.
i have a vodafone unit, but have flashed various roms without problems.
i am currently on the latest i-mate.
steve

Hi Steve
Thanks for replying.
I've got no idea what kind of ROM error is showing on the item as it is no longer in my possession. I am trying to contact my eBay buyer to find out exactly what message is showing and when.
What exactly is a ROM error anyway? As I stated previously, the phone was on for btween 2-3 hours and showed no signs of soft/hard ware damage. How do Rom error's occur?
Sorry to sound so vague and amateurish!!

I am no expert and have only been playing with these things for 9 months, but the only time I have ever seen ROM error is when i have been trying to flash a different ROM to my device, e.g the imate version to my vodafone machine.
Ask him what he did, what the error says and what he can see on the screen.Read the guide to installing a ROM and you can see what happens.
ROMs for specific versions such as imate will not flash to others such as vodafone unless you use a specific .exe file (the no id upgrade one).
If you try you will get an error, and sometimes you can get the machine up and running, other times you get a brick which can take time to get back to life.
steve
http://forum.xda-developers.com/viewtopic.php?t=43592

Please some body answer

I own a universal o2 xda exec purchased from uk. It has been working greatly for about 8 month (on another SIM provider) without any troubles.
Suddenly it receives no signal, the phone doesn't seem to see the SIM, I can't enen access the phone settings.
After performing a soft reset I checked the device information and found that radio version & protocol version are BLANCK noyhing is written, also the IMEI number doesn't exist, nothing is written.
I tried to install a new ROM but it didn't work, I got an error message about my ROM image that is not compatible with my country code!!!!!!
I've been advised to reinstall the WM5????
Please advise.

Sorry to hear that was it an eaby or simialr purchase?
if it is dodgy or needs rom/imei etc,tbh mate your on tricky ground sadly
as its hard to get help and people may assume its stolen etc ,even tho it seesm your the victim here
i hope im wrong and someone can highlight an easy remedy
maybe the radio stack has just encountered an issue

no it was purchased directly from uk.
and it was working just fine so why now?
no way to format & reinstall the original ROM?

tbh i dont know,but youll be hard pressed to find anywere to help without a imei,thats what i mean
Even tho it's not yourfault i think ,if you start messing with the imei ,its a poss jail term
so maybe people wont rush to aid you,hopefully someone with more expertise may be able to offer help
i just mentioned that due to the fact it may be why limited response to the post
i hope there is a simple and easy fix for you

elsaghirmo said:
I own a universal o2 xda exec purchased from uk. It has been working greatly for about 8 month (on another SIM provider) without any troubles.
Suddenly it receives no signal, the phone doesn't seem to see the SIM, I can't enen access the phone settings.
After performing a soft reset I checked the device information and found that radio version & protocol version are BLANCK noyhing is written, also the IMEI number doesn't exist, nothing is written.
I tried to install a new ROM but it didn't work, I got an error message about my ROM image that is not compatible with my country code!!!!!!
I've been advised to reinstall the WM5????
Please advise.
Click to expand...
Click to collapse
did u try hard resetting the phone? try installing the rom with a RUU with no_ID
have a look on this page, this may give you additional info;
http://wiki.xda-developers.com/index.php?pagename=HTC_Universal

Can you briefly describe how you did the ROM reinstallation (names of the files you opened, source, etc.)? You shouldn't be seeing the country code error message with the NO_ID installer.

have a look on this link;
http://wiki.xda-developers.com/index.php?pagename=Instructions for those with Country Code error

You mentioned something about a problem with the radio stack. I tryed to install a No_ID rom and the system stopped at the radio stack update step.
So is it a hardware that has to be changed or exactly what?
and what has the radio stack to do with the IMEI no not appearing.
Sorry for disturbance but I 'm seeking any help

T-Mobile MDA Keys Hang.

Hello everyone,
I am new to Windows Mobiles. I have bought a used T-Mobile MDA (HTC Wizard), The problem with this is all the keys except Power Button, Align Screen & Camera button hangs after a minute or two the mobile is turned-on. Nothing works. I have to use soft keys to make a call. If I press Camera button the camera interface appears, when I close it, all keys started to work normally but again after one or two minutes it hangs and I would have to again use the same technique to make them work. Sometimes all the keys work normally for more than a minute but again hangs. I have searched in all the system settings & I can't find any option to configure it. I have searched many threads on this site to solve this problem but can't find the appropriate answer. It seems to me someone have burned wrong ROM or did something wrong with its ROM for which it is acting like this. Given are the specs of ROM.
IPL/SPL = 2.26. G3
T-Mobile ROM.
I am using SIM of my operator other than T-Mobile. (SIM Unlocked)
Also If I try to Hard-Reset the phone, When It say me to "Press Send to restore factory default settings or anyother key to quite", All keys hangs and I have to make a soft reset to get into working.
Can anyone tell me what the problem and how can i solve it ?
How do I know whether its CID Unlocked or not ?
Does Upgrading/Reinstalling the ROM will solve the problem ?
Is it hardware problem ?
Thanks in advance.

One more thing
I also have did a hard-reset by following the given procedure.
Start->Settings->System->Clear Storage.
It installed the OS after boot and my installed softwares disappeared. Which means it really hard-reseted itself, But still the problem isn't solved.
I am pretty much sure now its ROM/Hardware problem !!
Any idea about the solution ?

Have you tried to flash a new ROM yet? That may solve the problem, it made my power button work again.

mobby_reload said:
Also If I try to Hard-Reset the phone, When It say me to "Press Send to restore factory default settings or anyother key to quite", All keys hangs and I have to make a soft reset to get into working.
Click to expand...
Click to collapse
I'm not sure, but that sounds to be seems like hardware problems. I'm not sure if that screen actually has anything to do with the ROM at all, which at best, it is IPL related? I would suggest you to try an offical T-Mobile ROM, which includes everything (i.e. IPL, SPL, and ROM) and see if this problem persists.

Can't find the official T-Mobile ROM.
Thanks for your replies. Can you please tell me from where I can find the Official T-Mobile ROM, I have searched on this site & xda-developers ftp site a lot, Some links are broken and somewhere FTP requires authentication. Also can't find it on Google. I think ruu_prodigy_1081002_104_10910_tmo_usa_ship is the original ROM file but can't find it anywhere except the T-mobile site which require a valid T-mobile no. Can you post some valid like here to download the file.
Thanks again.

If you were to go Wiki, at the ROM table page, bottom line, you would to find this
http://www.tm-phonedownloads.com/
which should be a global site (if not US site), and if you go into it, 'MDA Vario', there is a ROM EXE to update to AKU. I saw it as UK which probably because I have an UK ip, you try going in and see if you have US version instead.
Also, for the TMobile US, you can consider getting a PAYG card just to get a valid tmobile number to get into the page to download stuff, IF you are sure there are something there (e.g. and if PAYG is cheap)

Ok, I got the UK version. I'll give it a try.

hanmin said:
I'm not sure, but that sounds to be seems like hardware problems. I'm not sure if that screen actually has anything to do with the ROM at all, which at best, it is IPL related? I would suggest you to try an offical T-Mobile ROM, which includes everything (i.e. IPL, SPL, and ROM) and see if this problem persists.
Click to expand...
Click to collapse
Well, I have tried Official ROM. But the problem is still there. I am also now pretty much sure that its a hardware problem. I guess the mobile needs to go to scrap now.

Phone Function Dead?

Ive been having some problems off and on with my phone not getting any service. I would restart the phone and it would work for a while. But now I cannot get service anywhere and the phone seems to not work at all.
Has anyone else experienced this or are there any tricks to try and fix this. Any help would be greatly appreciated, as the device seems to be now useless. Thanks

Yep, same with me. I've just upgraded ROM to Faria's last version and still not working the dam phone func
My provider is Vodafone-PT, and i have a Dual Simcard. Even when the other sim is off (unregistered on the vdf network) my hermes simply doesn't register. Not even the emergency number calls are avaiable!!! However, all the other funcs are working fine.
I think it is a softw issue, but i'm still not getting to the point to solve this problem...hope some masters can help us.
regards

plenty of things you can try and troubleshoot with, hard reset, check for bad blocks, flash new radio/ROM.

As XtreMe_G said. I've been running Faias for the last week or two with no radio problems. HR problems, now thats another story. Mke me wanna go back to wm06.

...my problem now is WORST...i've tried to downgrade SPL to unlock CID and SIM, but for somehow the active sync crashed during the rom upgrade. Now i only see the tricolor screen, and active sync doesn't recognize my term!!!

The tri-color screen is bootloader mode and active sync will not recognize your device at this point. Start the ROM upgrade again and go through it. Sometimes the cooked ROMs might flash otherwise always, shipped roms are capable of being flashed from bootloader itslef.
Regards,
Carty..

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
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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.