Database Develop

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] 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

Please delete.

Please delete.

max2089 said:
Hi I have a Xperia Z C6603,
Yesterday i flashed custom rom,Flyme Os. Beginning Everything is fine,but after i restart it,he can't detect sim card.
I tried to reflash it ,still no working.
But after i flashed Official Firmware,it can detect sim card inserted or removed,but when inserted or removed sim card,it will auto restart.
Once auto restaring ,my xperia z can't detect Sim card again.
Please Help.
I am from Malaysia .Sorry for my bad english.
Click to expand...
Click to collapse
it seems that the rom has some problems I suggest downloading another rom

max2089 said:
Hi I have a Xperia Z C6603,
Yesterday i flashed custom rom,Flyme Os. Beginning Everything is fine,but after i restart it,he can't detect sim card.
I tried to reflash it ,still no working.
But after i flashed Official Firmware,it can detect sim card inserted or removed,but when inserted or removed sim card,it will auto restart.
Once auto restaring ,my xperia z can't detect Sim card again.
Please Help.
I am from Malaysia .Sorry for my bad english.
Click to expand...
Click to collapse
problem with the rom. did you notice baseband missing error?

ExCuTioN said:
it seems that the rom has some problems I suggest downloading another rom
Click to expand...
Click to collapse
I use Sony Software to update and repair itselft. Still can't. I try use flashtool too, but always no success.

codfx said:
problem with the rom. did you notice baseband missing error?
Click to expand...
Click to collapse
I use Sony software update and repair itself. I don't see any notice and that software told me,updated to latest firmware.

max2089 said:
I use Sony Software to update and repair itselft. Still can't. I try use flashtool too, but always no success.
Click to expand...
Click to collapse
it seems the rom doesnt work properly[NOT your fault] if you want to use your sim card switch back to stock rom or any other like CM

ExCuTioN said:
it seems the rom doesnt work properly[NOT your fault] if you want to use your sim card switch back to stock rom or any other like CM
Click to expand...
Click to collapse
I use other Pc and flashtool to flashed HK version. still same problem, is it hardware issues?Thank you ur helping.

max2089 said:
I use other Pc and flashtool to flashed HK version. still same problem, is it hardware issues?Thank you ur helping.
Click to expand...
Click to collapse
are you using custom rom or sony stock?

Stock rom,FTF file download from XDA thread.:crying:

ExCuTioN said:
are you using custom rom or sony stock?
Click to expand...
Click to collapse
Stock Rom ftf file.downloaded from xda thread.

max2089 said:
Stock Rom ftf file.downloaded from xda thread.
Click to expand...
Click to collapse
then it must be a hardware problem the best thing you can do is get your phone at a sony verified repair store [another thing you could possibly do is a factory reset but it is not recommended since it will delete your phone's data]

xperia z1 no signal problem (HELP!!!!)

my xperia z1 suddenly have no signal.
i already tried my sim to other phone, it works perfecting and have a full bar of signal.
i also tried other sim network to my z1, but it also indicates no signal.
i tried to repair it using pc companion, but the problem is still the same.
i also tried hard/factory reset my z1, still same problem.
i can access the sim option and function, but still no signal.
i also try using simcard reader app, it can read my sim card and i can view my simcard information.
so i think my phone simcard reader is functional.
I need your help to solve my problem on my only phone. thank you:crying::crying::crying:

Did you drop the phone or hurt it physically? Sounds like a hardware issue to me.

xasbo said:
Did you drop the phone or hurt it physically? Sounds like a hardware issue to me.
Click to expand...
Click to collapse
no sir.. no physical damage at all..
do you think flashing it can fix the problem?
thanks sir

@lonesome10
I tampered once with the radios and selected USA bands, and had no signal but clean reflashing a rom brought it back to life.
You said though, you already tried repairing it through PC Companion so I don't know if you can solve the problem.
If you have flashtool, try flashing an ftf from here and see if that helps, otherwise I can't think of anything else.

@yngwie_m
thanks for your reply.. I have no idea regarding flashing of my xperia.
can you send me a tutorial on how flash xperia z1. I want a stock firmware flash.
again many thanks..

lonesome10 said:
@yngwie_m
thanks for your reply.. I have no idea regarding flashing of my xperia.
can you send me a tutorial on how flash xperia z1. I want a stock firmware flash.
again many thanks..
Click to expand...
Click to collapse
@lonesome10
I am now on my Xperia. When I get back home to my laptop I will try to gather links and make a fast tutorial. Or if anyone else can do it that would be nice too.
Will be right back.
No need for thanks. I 've been to where you are now it was annoying.

@yngwie_m
I already flash it using a ftf from xperifirm. no changes, still no signal from my network.
i am still hoping that i can solve this problem...

lonesome10 said:
@yngwie_m
I already flash it using a ftf from xperifirm. no changes, still no signal from my network.
i am still hoping that i can solve this problem...
Click to expand...
Click to collapse
In that case I am out of ideas too, and close to thinking it is a hardware issue.
Because in my case flashing a clean ftf brought it back.

yngwie_m said:
In that case I am out of ideas too, and close to thinking it is a hardware issue.
Because in my case flashing a clean ftf brought it back.
Click to expand...
Click to collapse
i want to downgrade my phone of software.. is that possible? sorry i am new on flashing an android phone..

@lonesome10
Yes it is possible. You wrote you managed to flash an ftf from xperifirm, which means you downloaded the files, and used to flashtool to create an ftf. Correct?
Now go to xperia z1 general section and in there, there is a thread containing stock ftfs.
Download one (preferably a kitkat 14.4.a.0.108), and flat it through flashtool again. Do not check anything in flashtool, that means wipe everything and do a clean flash.
See how that goes.

@yngwie_m,
Yes I manage to flash it by downloading a firmware from xperifirm then create a FTF using flashtool and I flash my phone.
If I download a firmware (preferably a kitkat 14.4.a.0.108), do I have to use flashtool to create a FTF file then flash my phone? or I don't have to create a FTF file and directly flash my phone with the firmware I downloaded using flashtool. I am from the Philippines, is there a firmware that is made for PH user? What is generic/unbranded or branded FW? what is rom and kernel?
Sorry again for the inconvenience, I don't have experience with flashing using different firmware.. again thank you for your effort to solve my phone problem. I appreciate it so much!!!

@lonesome10
On the 3rd page of Xperia Z1 General subforum, there is a thread called "[FTF] C6902 & C6903 & C6906 & C6943 FTF Mega Collection".
On the first post it has all stock uprooted ftfs.
So find which variant you have (C6902, C6903, C6906, etc) and download the corresponding ftf. Any Generic or Global ftf will do.
You will be downloading an .ftf file so no need to create it. Just flash it through flashtool.
Don't worry about roms and kernels. You have to make the phone work again for starters.
Branded is an ftf that contains stuff from a brand, like Vodafone or o2 or whatever.
Unbranded is a clean ftf as given from Sony to carriers.
So to sum up, for starters go to that thread and get an ftf to flash through flashtool.
To check your variant, see the phone package or in dialer press *#*#7378423#*#* and in Service Menu go to Service info -> Model info to see which one you have and download appropriate ftf.

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