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IMEI but No Signal, please help!

Hello
I'm new here and I don't know what can I do to fix my phone, please help!
I have a Z1 C6903 from HK and suddenly during a phone call my phone lost signal and now it can't connect to my carrier network.
I tried a factory reset, upgrading with SUS and flashing original HK ftf but still have the issue.
I also tried flashing different ftf files (.290 , .257 , .534(NUT) , .531 , .681 and .757), sometimes I lost my IMEI but I figured out how to recover it, however, I recovered my IMEI but I still have no signal at all.
Could it be physical damage on my phone?
I hope I can fix it with software.
Any ideas?
I don't know what else can I do
Thank you!

you tried many ways, but did you try another sim card, lol?
Sent from my C6903

hxq88 said:
you tried many ways, but did you try another sim card, lol?
Sent from my C6903
Click to expand...
Click to collapse
Lol, yes I tried another sim card and it doesn't work, I also tried my sim card in other phones and works as a charm!
I noticed that this happened to other people and they fix it with SUS or flashing other ftf, I guess I'm not that lucky
Thanks!

After downgrade via flashtool did you try OTA update? Sometimes it's lose imei when flash older firmware, but after OTA update imei will restore. Hope it can help
Sent from my C6903

hxq88 said:
After downgrade via flashtool did you try OTA update? Sometimes it's lose imei when flash older firmware, but after OTA update imei will restore. Hope it can help
Sent from my C6903
Click to expand...
Click to collapse
I'll try that today. Downgrade to .290 and then OTA?
Thanks!

JMove said:
Hello
I'm new here and I don't know what can I do to fix my phone, please help!
I have a Z1 C6903 from HK and suddenly during a phone call my phone lost signal and now it can't connect to my carrier network.
I tried a factory reset, upgrading with SUS and flashing original HK ftf but still have the issue.
I also tried flashing different ftf files (.290 , .257 , .534(NUT) , .531 , .681 and .757), sometimes I lost my IMEI but I figured out how to recover it, however, I recovered my IMEI but I still have no signal at all.
Could it be physical damage on my phone?
I hope I can fix it with software.
Any ideas?
I don't know what else can I do
Thank you!
Click to expand...
Click to collapse
Did You try to manually flash each ROM following the release versions, from the oldest to the newest without skipping any build number (else You won't get signal and IMEI)?

mr.loverlover said:
Did You try to manually flash each ROM following the release versions, from the oldest to the newest without skipping any build number (else You won't get signal and IMEI)?
Click to expand...
Click to collapse
That's not needed and the OP says he does have IMEI so that's not the problem anyway

mr.loverlover said:
Did You try to manually flash each ROM following the release versions, from the oldest to the newest without skipping any build number (else You won't get signal and IMEI)?
Click to expand...
Click to collapse
I flashed stock ftf, I'm not flashing a custom ROM.
Do you mean to flash .518, then 5.34 then .257 then .290 and so on to .757?
Thank!

Yes, I do have IMEI but I don't have signal, it's weird!

I had this problem with my old galaxy note 2
The radio chip most likely broken.
Contact sony for warranty if any left!
Sent from my C6906 using XDA Free mobile app

When I insert my sim it shows my a message that says "SIM card could not be read".
Could the problem be the sim card reader ??
Thanks!

crzygrmn said:
I had this problem with my old galaxy note 2
The radio chip most likely broken.
Contact sony for warranty if any left!
Sent from my C6906 using XDA Free mobile app
Click to expand...
Click to collapse
Hi, I don't think is the radio chip, because I can see my carrier signal using the app Network Signal Info.
And it seems thta is not SIM locked, no X on the left. I don't know what can be the issue

Sorry to dig up this, but have you figured that out?
Were you to get signal again????
If so, what did you do?

hey did you figure it out? i am having the same problem! though it occured after flashing a custom rom. i noticed lost imei but then i recoverd it. now i have tried almost every ftf and even SUS. imei appears but shows no sim card inserted

[Q] The phone is useless, HELP

I updated my to 4.4.4 via Sony PC Companion and then rooted it with easyrootool and installed the dualrecovery. Everything seemed fine but after the first reboot i noticed that the there is no cellular connectivity. Wifi and Bluetooth work and the sim is recognized but the the phone says'inavlid card'. The phone sim unlocked. Not only that but my phone doesn't want to take pictures anymore. The camera doesn't focus and when I press the camera button it does nothing. Also when I connect the phone to the computer and try to copy somthing the windows explorer doesn't respond either way. I tried to repair the software via Pc Companion but it gave me the same result. To be clear the bootloader is locked and there was no sim lock but when i enter the service info i get this. Please anyone that can help ?

You tried with different SIM card?
Or just try to reinsert SIM card.
Try to go to recovery and wipe cache (both cache)
If that doesn't help, flash ftf again and test everything before you root device.
Sent from my D6503 using Tapatalk

funky0308 said:
You tried with different SIM card?
Or just try to reinsert SIM card.
Try to go to recovery and wipe cache (both cache)
If that doesn't help, flash ftf again and test everything before you root device.
Sent from my D6503 using Tapatalk
Click to expand...
Click to collapse
I tried a different card with the same result. I am currently on stock without root and dualrecovery. what do you suggest?

FahmyAbou said:
I tried a different card with the same result. I am currently on stock without root and dualrecovery. what do you suggest?
Click to expand...
Click to collapse
If it's still not working - I would flash last good ftf (be sure that one worked before)
Test everything...
If everything is working, flash 4.4.4 ftf but exclude baseband files....
Then check is it O.K...
And yeah...full wipe is something you should do now...
You have to get rid of old files...
Sent from my D6503 using Tapatalk

funky0308 said:
If it's still not working - I would flash last good ftf (be sure that one worked before)
Test everything...
If everything is working, flash 4.4.4 ftf but exclude baseband files....
Then check is it O.K...
And yeah...full wipe is something you should do now...
You have to get rid of old files...
Sent from my D6503 using Tapatalk
Click to expand...
Click to collapse
OK I'll try that now but do you have any idea what couls have caused these problems? the camera, cellular network and storage

FahmyAbou said:
OK I'll try that now but do you have any idea what couls have caused these problems? the camera, cellular network and storage
Click to expand...
Click to collapse
Who knows...
Something in flashing process screwed firmware...
I'm sure everything will be OK after new flashing...
Signal could be problem again, that's why I suggested - flash ftf without baseband files. -
So...
Flash older ftf (the one that was working before)
Test to be sure everything is working fine.
Flash new fw without baseband files.
Test it...
I'm using Generic DE or my country fw.
That's something you should do, Singapore, China or similar fw could be problem in EU or US...
Sent from my D6503 using Tapatalk

funky0308 said:
Who knows...
Something in flashing process screwed firmware...
I'm sure everything will be OK after new flashing...
Signal could be problem again, that's why I suggested - flash ftf without baseband files. -
So...
Flash older ftf (the one that was working before)
Test to be sure everything is working fine.
Flash new fw without baseband files.
Test it...
I'm using Generic DE or my country fw.
That's something you should do, Singapore, China or similar fw could be problem in EU or US...
Sent from my D6503 using Tapatalk
Click to expand...
Click to collapse
Thank you I will download it now and flash it and then give you the feedback

FahmyAbou said:
Thank you I will download it now and flash it and then give you the feedback
Click to expand...
Click to collapse
Sure....
If you have your carrier / country ftf, flash that first to test and to have right baseband/modem/radio files..
Sent from my D6503 using Tapatalk

I can't that specific one for my carier. It's Austrian A1

Try to downgrade to older rom, if then everything works fine then you may try upgrading again.
Sent from Xperia Z1, or maybe not anymore

So i tried to flash the FTF file with flashtool but i get an error
ERROR - Processing of system.sin finished with errors.
INFO - Ending flash session
I don't know what that means but the process is still running. Should I disconnect the phone or leave it?
EDIT: I tried it again with a different cable and it worked..now I have to see if it worked

@funky0308
I'm on firmware .757 now and the camera is working again and I can copy things from an to the phone but the problem with the signal is still there. It says that the simcard is invalid, but like i said the phone was sim unlocked

Try the simcard in another phone or try another sim card in your phone so that you can eliminate the chance of having a defective simcard

gregbradley said:
Try the simcard in another phone or try another sim card in your phone so that you can eliminate the chance of having a defective simcard
Click to expand...
Click to collapse
Tried different cards but none of them work

[Q] Lost network & relocked BL?

Hello,
I've a weird problem with my Xperia SP. Today i wanted to get back to rom based on stock rom to get miracast feature.
I downloaded newest existenz rom and williams kernel for stock based roms. Installation went fine system booted ok and everything worked fine. After some time phone turned off and didn't wanted to start. Only flashmode worked. I've decided to download stock .205 CE1 rom and flash it.
It booted up, sim card was recognized(had to write PIN). After that network was not found. Signal with red "X". I've tried to manually register to network but i could not.
Next thing is that after flashing stock rom fastboot mode stopped working. Service menu shows that Bootloader can not be unlocked even that it was unlocked before and flashtool(BLU option) shows that it is still unlocked. Flashtool also shows Bootloader: NOT_ROOTABLE.
I have actually no idea what have happend. Now i'm installing stock rom using Sony PC Companion but i think this wont help for network problem.
My main network is PLUS GSM(Poland network).
Could sim card die? It is old type card (almost 10 years) and i had to cut it manually to fit micro sim for the phone.
prntscr,com/45wtip (swap ','(comma) with '.'(dot))

KrychoPL said:
Hello,
I've a weird problem with my Xperia SP. Today i wanted to get back to rom based on stock rom to get miracast feature.
I downloaded newest existenz rom and williams kernel for stock based roms. Installation went fine system booted ok and everything worked fine. After some time phone turned off and didn't wanted to start. Only flashmode worked. I've decided to download stock .205 CE1 rom and flash it.
It booted up, sim card was recognized(had to write PIN). After that network was not found. Signal with red "X". I've tried to manually register to network but i could not.
Next thing is that after flashing stock rom fastboot mode stopped working. Service menu shows that Bootloader can not be unlocked even that it was unlocked before and flashtool(BLU option) shows that it is still unlocked. Flashtool also shows Bootloader: NOT_ROOTABLE.
I have actually no idea what have happend. Now i'm installing stock rom using Sony PC Companion but i think this wont help for network problem.
My main network is PLUS GSM(Poland network).
Could sim card die? It is old type card (almost 10 years) and i had to cut it manually to fit micro sim for the phone.
prntscr,com/45wtip (swap ','(comma) with '.'(dot))
Click to expand...
Click to collapse
Use flashtool to flash stock firmware by ftf file. Here:
http://forum.xda-developers.com/showthread.php?t=2311964
Use an older one and if that does not work, try one or two more. Hopefully, that will help. Best of luck!

shahrukhqasim said:
Use flashtool to flash stock firmware by ftf file. Here:
http://forum.xda-developers.com/showthread.php?t=2311964
Use an older one and if that does not work, try one or two more. Hopefully, that will help. Best of luck!
Click to expand...
Click to collapse
Does it matter which country is it for? I can try some of them but i think that won't help. I've checked other sim card and it was recognized but didn't even ask me for pin. Weird Oo.
If nothing helps i will just flash stock firmware with SEUS and let sony service take care of it, hopefully. Phone still has guarantee.

KrychoPL said:
Does it matter which country is it for? I can try some of them but i think that won't help. I've checked other sim card and it was recognized but didn't even ask me for pin. Weird Oo.
If nothing helps i will just flash stock firmware with SEUS and let sony service take care of it, hopefully. Phone still has guarantee.
Click to expand...
Click to collapse
Regions perhaps. But the thing that does not make sense it that that why did it work before and not now? It should work. Anyway, my SIM was mini too. I, too, had to cut it. It works. Or possibly contact your service provider maybe something is wrong with the SIM. They might have have locked it or something?

shahrukhqasim said:
Regions perhaps. But the thing that does not make sense it that that why did it work before and not now? It should work. Anyway, my SIM was mini too. I, too, had to cut it. It works. Or possibly contact your service provider maybe something is wrong with the SIM. They might have have locked it or something?
Click to expand...
Click to collapse
If none sim card works on phone then it is IMEI problem or phone itself somehow. I'm trying to flash other roms now. Hopefully it will help if not then sending to service.

KrychoPL said:
Hello,
I've a weird problem with my Xperia SP. Today i wanted to get back to rom based on stock rom to get miracast feature.
I downloaded newest existenz rom and williams kernel for stock based roms. Installation went fine system booted ok and everything worked fine. After some time phone turned off and didn't wanted to start. Only flashmode worked. I've decided to download stock .205 CE1 rom and flash it.
It booted up, sim card was recognized(had to write PIN). After that network was not found. Signal with red "X". I've tried to manually register to network but i could not.
Next thing is that after flashing stock rom fastboot mode stopped working. Service menu shows that Bootloader can not be unlocked even that it was unlocked before and flashtool(BLU option) shows that it is still unlocked. Flashtool also shows Bootloader: NOT_ROOTABLE.
I have actually no idea what have happend. Now i'm installing stock rom using Sony PC Companion but i think this wont help for network problem.
My main network is PLUS GSM(Poland network).
Could sim card die? It is old type card (almost 10 years) and i had to cut it manually to fit micro sim for the phone.
prntscr,com/45wtip (swap ','(comma) with '.'(dot))
Click to expand...
Click to collapse
i got the exact same problem right now after using william kernel, can you fix it?

Muh_lukman94 said:
i got the exact same problem right now after using william kernel, can you fix it?
Click to expand...
Click to collapse
I've reflashed stock rom using SEUS and sended phone to sony service. Hopefully they can help. Be careful with Williams Kernel for stock roms. This may be a common bug.

For anyone who had the same problem. Sony exchanged my whole phone with information that mainboard was broken. They said that phone could not be fixed.
Good luck
PS. Topic can be closed i think.

KrychoPL said:
For anyone who had the same problem. Sony exchanged my whole phone with information that mainboard was broken. They said that phone could not be fixed.
Good luck
PS. Topic can be closed i think.
Click to expand...
Click to collapse
Where have you been before? I have the same problem after flashing William kernel for stock rom((( What to do now?

Everything i've done is described in the thread. Phone was exchanged by sony after all.

KrychoPL said:
Everything i've done is described in the thread. Phone was exchanged by sony after all.
Click to expand...
Click to collapse
I think i have the same problem, but up till now no one knows the answer, the biggest problem is my warranty is over, i hope someone here can help :crying:
---------- Post added at 07:29 PM ---------- Previous post was at 07:24 PM ----------
KrychoPL said:
Everything i've done is described in the thread. Phone was exchanged by sony after all.
Click to expand...
Click to collapse
I have the same problem here, and the biggest problem is my warranty expired, hope someone here can help..

Muh_lukman94 said:
i got the exact same problem right now after using william kernel, can you fix it?
Click to expand...
Click to collapse
do a restore of Your TA will fix the problem, now my phone can detect SIM card

[Q] Xperia z1 don't recognize sim card in custom roms

Hello guys,
Please, I installed a custom rom on my xperia z1 from C6903_14.1.G.1.534 firmware, but I'm not getting that rom recognize the sim card. I already installed other custom roms, but the problem continues, the sim card is connected, but the system did not recognize it as connected. with the stock firmware sim card works, but the custom roms it does not recognize. I wonder if anyone ever had this problem or know how to solve?
Thank you in advance and any help is welcome

Jean_w said:
Hello guys,
Please, I installed a custom rom on my xperia z1 from C6903_14.1.G.1.534 firmware, but I'm not getting that rom recognize the sim card. I already installed other custom roms, but the problem continues, the sim card is connected, but the system did not recognize it as connected. with the stock firmware sim card works, but the custom roms it does not recognize. I wonder if anyone ever had this problem or know how to solve?
Thank you in advance and any help is welcome
Click to expand...
Click to collapse
what if you try to flash the latest KitKat firmware .108 for your phone & see it works or not
If yes then try to reinstall the custom rom you want

Ben Ling said:
what if you try to flash the latest KitKat firmware .108 for your phone & see it works or not
If yes then try to reinstall the custom rom you want
Click to expand...
Click to collapse
Thank you very much solved the problem 100%: D

Invalid Card Message

I updated my xperia z1(c6906) to 5.1.1 using flashtool. i am from bahrain and the ftf file was US generic. after update my phone shows Invalid sim message. I tried installing older firmwares but still no use. Rest everything works fine.
what should i do?
I had installed c6903 ftf file so does it effect the phone?

prashanth0626 said:
I updated my xperia z1(c6906) to 5.1.1 using flashtool. i am from bahrain and the ftf file was US generic. after update my phone shows Invalid sim message. I tried installing older firmwares but still no use. Rest everything works fine.
what should i do?
I had installed c6903 ftf file so does it effect the phone?
Click to expand...
Click to collapse
If your phone is 6906 than you should only use 6906 firmwares to update your phone.
Hasn't their been a update notification on your phone?

motorazrv3 said:
If your phone is 6906 than you should only use 6906 firmwares to update your phone.
Hasn't their been a update notification on your phone?
Click to expand...
Click to collapse
I managed to get the original customization version for middleeast, after installing its the same.
I tried checking for an update via Sony companion. it says i have the recent update. is something wrong with the sim card reader in phone?

prashanth0626 said:
I managed to get the original customization version for middleeast, after installing its the same.
I tried checking for an update via Sony companion. it says i have the recent update. is something wrong with the sim card reader in phone?
Click to expand...
Click to collapse
I don't know. I think it has something to do with the baseband maybe.
I never had the situation that I flashed a wrong firmware to my phone.
Are you sure you downloaded the firmware you needed?
Have you tried the repair function from pc Companion?

motorazrv3 said:
I don't know. I think it has something to do with the baseband maybe.
I never had the situation that I flashed a wrong firmware to my phone.
Are you sure you downloaded the firmware you needed?
Have you tried the repair function from pc Companion?
Click to expand...
Click to collapse
yeah, managed to get the right middleeast firmware. i even tried repair option through pc companion. its still the same.

prashanth0626 said:
yeah, managed to get the right middleeast firmware. i even tried repair option through pc companion. its still the same.
Click to expand...
Click to collapse
check your IMEI , its okey or 0000?
Read this