Database Users

[Q] No gsm signal sgs2.

I have been using the fone for 3 weeks and now it lost gsm signal. Gps, wifi working fine. It is simlock free, firmware upgraded to latest, few factory resets still no luck. The signal icon shows normal signal but when you trying to ring it tell " mobile network not available" Many sim cards checked - nothing Is there any trick?
thank you

qwojtus said:
I have been using the fone for 3 weeks and now it lost gsm signal. Gps, wifi working fine. It is simlock free, firmware upgraded to latest, few factory resets still no luck. The signal icon shows normal signal but when you trying to ring it tell " mobile network not available" Many sim cards checked - nothing Is there any trick?
thank you
Click to expand...
Click to collapse
what was the last thing u did to the phone before it started to lose signal

I did nothing am basic usher. No dropped, no experiments. Two days ego wake up and i cant ring.

Firmware upgrade official via Kies .??? Or Samsung stock firmware via Odin .
Correct CSC in phone for your country likewise correct modem.
jje

It happened before upgrade, after upgrade no changes i did it via kies samsung stock firmware. I bought it in England i live in England. What that is CSC ?

Check with your network to see if the IMEI has been blocked. I've had this happen - it was an error on the networks part.
EDIT: ...I say network, but it was the the third party that provides the block list that really made the mistake (it was blocked on all networks for 2 weeks!)

qwojtus said:
It happened before upgrade, after upgrade no changes i did it via kies samsung stock firmware. I bought it in England i live in England. What that is CSC ?
Click to expand...
Click to collapse
CSC = country specific codes . dial *#1234#
I would return to seller .
jje

[Q] G900F Network registration problem after flashing

Hi I have international version of S5 G900F. I flashed the phone with UK BTU stock rom. Now the problem is I cannot connect to the Network.
I tried going to Settings->More Networks -> Network Operators -> Select automatically . It took 5-10 mins to search but cannot connect.
Sim is not locked as it was working before I flashed the stock rom. also I read somewhere in internet that once the phone is region unlocked, it is permanently unlocked to use any other country sim. I don't know the original region of my phone but I bought it in Uk from 3rd party dealer not from any carrier.
I can think of two thing at the moment. It should be either regional locked again, but it does not prompt any thing to activate or enter pin or anything like that. or it should be wrong modem.
Is there a way to find if the phone is region locked ?
and is there a way to find correct region of the phone ?
the label on the box was removed so I cannot find from the box as well.
Thanks in advance.

I still haven't fixed this problem. Could someone suggest how to fix?

I've attached some screenshots with my phone info.
first image shows NETWORK:UNBLOCKED and IMEI Certi: PASS
-> I think this means, the phone is not blocked by network, and IMEI certificate has passed so it's not stolen or lost claimed phone.
another screenshot is the Firmware and CSC code/country information,
-> this means, this phone is build to sell in UK, so UK sim should unlock the regional lock.
Also the phone was working fine before I installed stock rom which I dowloaded from sammobile.
in the sceenshot, one of the network is connected but it says emergency call only because it cannot register to the network.
It is not sim lock also, because when I put T-mobile sim it does not ask for pin to unlock also.
what is wrong here. any idea guys? xda supposed to be the biggest android forum and samsung s5 is one of the most popular phone at the moment, isn't there anyone who have similar problem and solved? or atleast give some reason this cannot be fixed at all.

does the TMobile sim work? does it register with the network? If yes, then call the provider (of the other sim) and ask what's going on. Maybe you have a broken sim?

blesio said:
does the TMobile sim work? does it register with the network? If yes, then call the provider (of the other sim) and ask what's going on. Maybe you have a broken sim?
Click to expand...
Click to collapse
I've tried with Orange sim, and it still cannot register to the network. When I put the orange sim, it pop up a dialogbox asking to choose a network provider, there was two options, T-mobile and orange. So it is detecting the sim, but it cannot register.
And also, I tried my sim in another phone, and my sim works in another phone without any problem.

Did you try to flash the firmware again, and then after that restore factory defaults?

blesio said:
Did you try to flash the firmware again, and then after that restore factory defaults?
Click to expand...
Click to collapse
Yes I did, still it didn't work. I emailed samsung customer service with the problem, and they asked me to restore factory defaults.
I did that again but didn't work.
I tried one custom ROM as well. same problem in that rom.

You're rooted? If yes then there might be problem with the modem part of the ROM, can you install the official one part ROM and try with that?

blesio said:
You're rooted? If yes then there might be problem with the modem part of the ROM, can you install the official one part ROM and try with that?
Click to expand...
Click to collapse
I've installed stock rom several times, and several different versions( from here: http://www.sammobile.com/firmwares/1/?model=SM-G900F&pcode=0 ). Rooted several times, installed modem.bin files several times from many custom rom/ stock rom. None of them worked. I tried installing modem.bin when not rooted as well. And all the attempt failed.
I did everything I could possibly think of , Then I posted the question in the forum.

You have the IMEI ??!? Or it is lost?? Then only per efs-backup…
Or sim is broken…
Gesendet von meinem SM-G900F

lwiss said:
You have the IMEI ??!? Or it is lost?? Then only per efs-backup…
Or sim is broken…
Gesendet von meinem SM-G900F
Click to expand...
Click to collapse
I have imei , and sim is working fine, as I tested my sim in another phone.

uktel3315 said:
I have imei , and sim is working fine, as I tested my sim in another phone.
Click to expand...
Click to collapse
I'm having the same problem, but with G900H. I have stock firmware, rooted and everything's working fine until suddenly, I have no network. I restart the phone and get network again but only for a couple of minutes.
Sent from my SM-G900H using XDA Free mobile app

Any update?

XanoZuke said:
Any update?
Click to expand...
Click to collapse
Sry XanoZuke, I could not do anything to fix this, so I returned the phone and got another handset. I now have Exynos Octa-core version. Found snapdragon version is more power efficient. My phone gets heated very quickly.

uktel3315 said:
Sry XanoZuke, I could not do anything to fix this, so I returned the phone and got another handset. I now have Exynos Octa-core version. Found snapdragon version is more power efficient. My phone gets heated very quickly.
Click to expand...
Click to collapse
Don't worry, I found out that the motherboard was water damaged (the irony of life....), so a bought an LG G3.
Regarding the Exynos chip, I'm never buying anything exynos ever again. The performance is not as solid as Snapdragon and it gets heated really fast. Still, thanks for your reply! ?
Sent from my LG-D855 using XDA Free mobile app

uktel3315
Click to expand...
Click to collapse
So sad case remain unsolved, Got almost the same issue, Flashed 1st and last official firmware and custom rom without success NO NETWORK SIGNAL. No IMEI - Null regitered 15 zeros no efs backup etc.
Model : SM-G900S
ROM: XtrStoLite

edreab86 said:
So sad case remain unsolved, Got almost the same issue, Flashed 1st and last official firmware and custom rom without success NO NETWORK SIGNAL. No IMEI - Null regitered 15 zeros no efs backup etc.
Model : SM-G900S
ROM: XtrStoLite
Click to expand...
Click to collapse
have you found a solution yet? i have the exact same problem and have tried the same solutions as you listed...

have you found a solution yet? i have the exact same problem and have tried the same solutions as you listed...
Sorry i end up selling the phone as is..

Same deal
My g900f has no mobile services sims fine

I have the same problem.
Cannot connect to network after flashing new ROM. Since then I tried about 10 different original roms and couple custom roms. Number of different MODEMs and BOOTLOADERs but with no joy. SIM card works fine in different phone.
Also I tried to load different CERT files and QCN with Z3X Box but that didn't help either.
I've tried *#0011# command here are results:
with LTE/WCDMA/GSM auto-connect:
imgur.com/i69HCBM
with WCDMA only:
imgur.com/QPbvKHG
and GSM only:
imgur.com/8InhQWQ
It seems that GSM is not working at all.
At this stage I run out of ideas and probably gonna get rid of the phone as it is or use it as pimped-out ipod touch
(sorry for messed up links but I can't post to outside sites yet)

[Q] Simcard not register in network plz help

Simcard not register in network
my phone is NOTE 3 N9005
Working on android 5.0
my problem is my sim card not registering in network
my imei and baseband is ok same as in the phone .
but still no connectivity ,no calls ,no message ,,plz help me

jobinjohn said:
Simcard not register in network
my phone is NOTE 3 N9005
Working on android 5.0
my problem is my sim card not registering in network
my imei and baseband is ok same as in the phone .
but still no connectivity ,no calls ,no message ,,plz help me
Click to expand...
Click to collapse
More details needed I think.
Has it EVER worked? (i.e. did you just get the phone and it failed?) (just in case "working on Android 5" means that is what is on the phone and not that it WAS working on v5 )
What was the last thing you did before it stopped?
What firmware or ROM are you using?

Journyman16 said:
More details needed I think.
Has it EVER worked? (i.e. did you just get the phone and it failed?) (just in case "working on Android 5" means that is what is on the phone and not that it WAS working on v5 )
What was the last thing you did before it stopped?
What firmware or ROM are you using?
Click to expand...
Click to collapse
the phone is working fine except network issue...
MY android firmware is N9005XXUGBNL8
The imei no and baseband are also ok .. plzz help me
The firmware is orginal downloaded from sammobile
i have been using this lollipop firmware from 6 months

Change your sim card .
Check your APN in mobile network settings .

i also have the same problem. possibly hardware issue?

JJEgan said:
Change your sim card .
Check your APN in mobile network settings .
Click to expand...
Click to collapse
the sim works in all other mobiles..
and other sim also not working in my phone

jobinjohn said:
the sim works in all other mobiles..
and other sim also not working in my phone
Click to expand...
Click to collapse
This is sounding like hardware issues. Last thing to try would be download and install fresh version of your firmware, just in case something in your set up has become corrupted.

ayenzel said:
i also have the same problem. possibly hardware issue?
Click to expand...
Click to collapse
did u solve ur problem with no service emergency call ... plz help me if u solved

Backup your EFS partitions with EFS Pro. Then flash latest Samsung stock.

Something wrong with my Note 3

Hey guys
I don't know where to start but here we go
last week i bought a used Samsung Galaxy Note 3 ! on the system it shows Note 3 N9005 , and there's also the option of 4G/LTE so i was convinced that this is a N9005
everything works fine ; but the network signal is so weak and it only show " E " instead of " H " or " 4G "
And this is really what made me mad : When i verified the IMEI on several websites it shows That it's " a Note 3 N900 " !!!!! i couldn't believe that
cuz on the system it's N9005 ! on the Recovery it shows N9005 ! when i flashed a rom on it I used The N9005 Rom and it works ! on the boot logo it shows N9005
Only on imei verification it shows N900
So please is there any help ! what should i do ?

Run Phone Info from Play Store.

I don't know how to post images
It's not allowed to post images from an url
cuz this is my first post here
But on the app it shows N9005 also and everything is fine
i just can't understand

Weak Network >> Wrong Modem or Wrong settings /Wrong CSC .
IMEI wrong reads like its a stolen phone with a cloned IMEI .
Are you sure you have checked all in Phone Info .

Yeah everything in the app looks fine as a N9005
I tried even more apps wich shows informations about CPU and GPU and it shows the configuration that exist in N9005 not in N900
But whenever i check the imei it shows that this phone is N900 !!!!
I flashed it with several ROMs custum and official ! But nothing changes
Too weak network , it shows only "E"
My brother has the same model "Note 3 N9005" and he has no problem with network : 4G works like a charm ( we are on the same floor) so the problem is not from the network provider
Could you please tell how to change the modem or the CSC or whatever !! I really apreciate your help
Sent from my SM-N9005 using XDA Free mobile app

youbixo said:
Yeah everything in the app looks fine as a N9005
I tried even more apps wich shows informations about CPU and GPU and it shows the configuration that exist in N9005 not in N900
But whenever i check the imei it shows that this phone is N900 !!!!
I flashed it with several ROMs custum and official ! But nothing changes
Too weak network , it shows only "E"
My brother has the same model "Note 3 N9005" and he has no problem with network : 4G works like a charm ( we are on the same floor) so the problem is not from the network provider
Could you please tell how to change the modem or the CSC or whatever !! I really apreciate your help
Sent from my SM-N9005 using XDA Free mobile app
Click to expand...
Click to collapse
is the IMEI at the back under the battery is the same as in About Phone or *#06#?
but i'm suspecting something wrong with your antenna... or you can try *#2263# and change to LTE only
and please do hard format i.e clear data & cache in recovery before and after flash for best result.

Your phone probably has been injected with superimei number. You need to find a repair shop that can rebuild your imei number (or a working superimei number).
Try look at this thread to understand your issue...http://forum.xda-developers.com/showthread.php?t=2639341

stonedead said:
Your phone probably has been injected with superimei number. You need to find a repair shop that can rebuild your imei number (or a working superimei number).
Try look at this thread to understand your issue...http://forum.xda-developers.com/showthread.php?t=2639341
Click to expand...
Click to collapse
thanks man. good info. did you go to phone shop or fixed it yourself?

Fixed it at phone shop..

Phone not fully working ( No mobile data ) , Xiaomi Recommend a Re-flash

Hello Techies
On Christmas Day My Redmi 3S Prime gave up the ghost , the Mobile radio refuses to latch onto a 4G Network and can only reliably make a call when a GSM network is selected . This seems a pretty common bug , though I have scoured the solutions ( which seem to work for others ) ; swapping to multiple sims/providers , manually setting APM and Factory Reset , though the phone barely connects to 2G/ Edge Technology . This is a huge inconvenience as I use the phone for both business and personal life - not being able to use it is a royal pain in the ass .
I have contacted Xiaomi who recommend flashing to the official developer ROM Version: 7.12.21 (MIUI9) . I currently have latest MUI Global ROM (8.5) I have tried updating (downgrading ) to an earlier build (8.1) - using the 'upgrade' app on the phone , however this would not work , the device said it could not update to an earlier build . However I will try the developer ROM next , which I guess should work ?
The other option was the fastboot upgrade , which allegedly allows the phone to downgrade to a previous version ( I wanted a stable ROM , I dont really need Dev ROM ) . However the instructions are extremely vague and were written in a different environment (for earlier MUI builds and WIndows 7 ) . When following the official 'Fastboot' flash guide , it transpired that 'download mode' did not work with MUI 8.5 - so it seems the guide is irrelevant
Bottom line currently I am lost on what to do next . I will try the DEV ROM and see how that goes I guess .

After some reading , I am of the understanding that my Bootloader is locked ? I had purchased the phone with the official Global MUI rom installed and have only updated it with OTA official updates previously . I did not want to unlock the bootloader as my banking app (Barclays ) will not install on unlocked devices. I understand unlocking the bootloader also roots the phone .

90Ninety9 said:
After some reading , I am of the understanding that my Bootloader is locked ? I had purchased the phone with the official Global MUI rom installed and have only updated it with OTA official updates previously . I did not want to unlock the bootloader as my banking app (Barclays ) will not install on unlocked devices. I understand unlocking the bootloader also roots the phone .
Click to expand...
Click to collapse
Try flashing the phone in edl mode. I don't think it needs bootloader to be unlocked to do that.
For procedure you can refer Google

Update:
I did manage to update to MUI global 7.12.21 Beta using the Stock updater app . However this did not fix the issue , the phone still connects just with GSM and Edge Networks . I tried all of the existing configuration solutions after the update , which also did not resolve the issue .
I also contacted the Xiaomi Outlet on Aliexpress , they suggest that I unlock the bootloader , as per the email they had sent me
Thanks for telling us the troubles you met. Do not worry. We are here to help you.
Sorry to tell you, the phone you ordered has out of the 6 months free repair warranty.
Please try the suggestions below to try to fix the problem by yourself.
1. pls do Reset of the APN in Settings-Mobile Network-Choose the SIM card-Access Point Names-Reset to default
2. Reset the phone (Please copy your data before you doing this step)
3 download the Develop ROM of your cellphone from http://en.miui.com/download.html, and then transfer this ROM pack the folder ‘downloaded_rom’, then go to Updater APP click the button on the right top corner then choose option “Choose Update Package”, click the develop ROM you just download and wait for the system update succeed
4. If the 2 suggestions above can’t fix the problem,please unlock the phone and then flash it.
http://en.miui.com/unlock/
http://en.miui.com/a-232.html
Hope it is helpful for you.
Click to expand...
Click to collapse
My gut feeling is that this is a hardware issue , it seems as though the radio reciever has burned out . I have already flashed with the native app . Is it worth trying to unlock the bootloader and reflash another rom ?
I dont want to waste any more time on this , any suggestions or thoughts on this are appreciated

So the reseller is asking me to unlock the phone though the Mii Unlock App , then flash it .
How can this make the 4G radio come to life ?

90Ninety9 said:
So the reseller is asking me to unlock the phone though the Mii Unlock App , then flash it .
How can this make the 4G radio come to life ?
Click to expand...
Click to collapse
If you really feel it's a hardware issue, then it's recommended to claim the warranty or replace. I'd suggest you not to go with bootloader unlocking at this stage
---------- Post added at 05:21 PM ---------- Previous post was at 05:20 PM ----------
Also, ask the mods to move this thread to question and answers section.

Try *#*#4636#*#*
Than choose Telp Information1 >> choose type "LTE/WCDMA" or "LTE Only"

Hello
OK I made some progress , I changed the sim Card to an O2 Network Sim which works perfectly . I had tried exhausted all other practicable solution given including the above . This doesn't explain why the phone stopped working with all EE network providers ( tried Virgin , EE, Plusnet ) .
http://en.miui.com/thread-1429676-1-1.html

How can I find out which bands a sim card provider is using ( Live Information ) . I have tried to research this but bands have changed over the years , so not sure which provider is using which band . I wanted to determine which bands the phone will currently work on .