[Q] loss of gsm signal - Xperia Z Q&A, Help & Troubleshooting

Hi guys, please I need some help with my xperia z, it presently does not get any network regardless of changing sim. Dis occurred few days after upgrading to newest firmware .67. It worked fine after some days but signal started gettin poorer.realised dat after givin the phone a little bump it comes back to full signal.eventually it stopped getting network altogether, except in rare cases when I feel I'm close to a tower , it searches but cannot register on the network sayin to ensure that a network signal is in range 99asu.I also cannot switch to manual select of network. Please anybody with a solution. Want to know if its a hardware or software problem. I don't have a sony service centre here that can help me.thanks

I had a similar issue and found that my "APN" was missing (Telcel Mexico). I created a new APN from information on the Internet and all is well.
Sent from my C6602 using XDA Premium 4 mobile app

gwithrow said:
I had a similar issue and found that my "APN" was missing (Telcel Mexico). I created a new APN from information on the Internet and all is well.
Sent from my C6602 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
i doubt if its a similar issue. i dont get any signal at all

my brother it seems that the device is faulty... get it RMA'd

rohit25 said:
my brother it seems that the device is faulty... get it RMA'd
Click to expand...
Click to collapse
Pls what do you mean by RAM'd?

mibz said:
Hi guys, please I need some help with my xperia z, it presently does not get any network regardless of changing sim. Dis occurred few days after upgrading to newest firmware .67. It worked fine after some days but signal started gettin poorer.realised dat after givin the phone a little bump it comes back to full signal.eventually it stopped getting network altogether, except in rare cases when I feel I'm close to a tower , it searches but cannot register on the network sayin to ensure that a network signal is in range 99asu.I also cannot switch to manual select of network. Please anybody with a solution. Want to know if its a hardware or software problem. I don't have a sony service centre here that can help me.thanks
Click to expand...
Click to collapse
What model do you have??
You upgraded by PC Companion or by flashtool?? Maybe the baseband is incorrect and the phone don't have signal, maybe your carrier use two band and not both are in all coverage.

yamiAMR said:
What model do you have??
You upgraded by PC Companion or by flashtool?? Maybe the baseband is incorrect and the phone don't have signal, maybe your carrier use two band and not both are in all coverage.
Click to expand...
Click to collapse
Initially upgraded to .434 using flashtool, then .67 by OTA. By baseband do u mean 2g and 3g? Cos I don't get any form of signal at all.

Hi there, I have had the same problem: after updating the XZ to 4.2.2 (2.67 over OTA) the signal dropped instantly. Therefore I had to send it back Sony Care. They fixed it. The update has overwritten a different smallband/baseband-version above the other one, just as I suspected. I bet you can flash it yourself (your an XDA user..) instead of waiting 2 weeks or more. If you don't know how it works and you've absolutely no experience with flashing, just send it back to Sony care.
I think the easiest way is to flash a different (older) baseband-version on your XZ, reboot/factory reset and see if it works. The second method is to try downgrading the software to .244 INCLUDING the baseband-version, then update it by flashing the XZ to 2.67 while EXCLUDING the baseband-version. The third option is to re-flash (with flashtool) the 2.67 update but a different version (GLOBAL).
My phone details:
Modelnumber: C6603
Android-version: 4.2.2
Smallbandversion: 9x15A-ACEFWMAZQ-30110068-44
Kernelversion: 3.4.0g43a9ba9
Buildnumber: 10.3.1.A.2.67
Altough your smallband/baseband may differ from mine. Therefore, please find your own software-version. I'm using:
GLOBAL-LTE_10.3.1.A.2.67 (Netherlands)
Goodluck! Please let us know about your issue:fingers-crossed:.

mibz said:
Initially upgraded to .434 using flashtool, then .67 by OTA. By baseband do u mean 2g and 3g? Cos I don't get any form of signal at all.
Click to expand...
Click to collapse
But what Xperia Z model do you have?? C6603, C6602, C6606??
I have a similar situation in the case of C6603, in my carrier sometimes I have 2G signal but never 3G and other times no signal. In the case of OTA or PC Companion updates, sometimes upgrade to diferent model or carrier, I have a friend that upgrade his Xperia Arc by PC Companion but with the uncarrier firmware. Maybe this is your case, the OTA firmware don't well upgrade your base band.
In this case I suppose that you can flash only the baseband by Flashtool, but be carreful that the firmware was made for your Xperia Z (C6603, C6602, C6606).

yamiAMR said:
But what Xperia Z model do you have?? C6603, C6602, C6606??
I have a similar situation in the case of C6603, in my carrier sometimes I have 2G signal but never 3G and other times no signal. In the case of OTA or PC Companion updates, sometimes upgrade to diferent model or carrier, I have a friend that upgrade his Xperia Arc by PC Companion but with the uncarrier firmware. Maybe this is your case, the OTA firmware don't well upgrade your base band.
In this case I suppose that you can flash only the baseband by Flashtool, but be carreful that the firmware was made for your Xperia Z (C6603, C6602, C6606).
Click to expand...
Click to collapse
ok thanks i use a c6602

tally114 said:
Hi there, I have had the same problem: after updating the XZ to 4.2.2 (2.67 over OTA) the signal dropped instantly. Therefore I had to send it back Sony Care. They fixed it. The update has overwritten a different smallband/baseband-version above the other one, just as I suspected. I bet you can flash it yourself (your an XDA user..) instead of waiting 2 weeks or more. If you don't know how it works and you've absolutely no experience with flashing, just send it back to Sony care.
I think the easiest way is to flash a different (older) baseband-version on your XZ, reboot/factory reset and see if it works. The second method is to try downgrading the software to .244 INCLUDING the baseband-version, then update it by flashing the XZ to 2.67 while EXCLUDING the baseband-version. The third option is to re-flash (with flashtool) the 2.67 update but a different version (GLOBAL).
My phone details:
Modelnumber: C6603
Android-version: 4.2.2
Smallbandversion: 9x15A-ACEFWMAZQ-30110068-44
Kernelversion: 3.4.0g43a9ba9
Buildnumber: 10.3.1.A.2.67
Altough your smallband/baseband may differ from mine. Therefore, please find your own software-version. I'm using:
GLOBAL-LTE_10.3.1.A.2.67 (Netherlands)
Goodluck! Please let us know about your issue:fingers-crossed:.
Click to expand...
Click to collapse
thanks a lot, i'l try what u suggested, i know how to flash but dunno how i can do that without the baseband like u said, cos i already did a factory reset .i use a c6602 guess il find a version here that i can use.i'l hola at you if i hit any roadblocks cos i dont have esony care here.thanks a lot

mibz said:
ok thanks i use a c6602
Click to expand...
Click to collapse
Look this: C6602 10.3.1.A.2.67 STOCK
If you have doubts and I can help you tell me.

To find your version, just dial *#*#7378423#*#* => service info => software info => File system version: ......; download it from Xda and (re-)flash it. I've read about this; it happens a lot with XZ's with the GLOBAL firmware. You've probably the same version. Good luck and please let us know

tally114 said:
To find your version, just dial *#*#7378423#*#* => service info => software info => File system version: ......; download it from Xda and (re-)flash it. I've read about this; it happens a lot with XZ's with the GLOBAL firmware. You've probably the same version. Good luck and please let us know
Click to expand...
Click to collapse
hi, i jst re flashed with the 2.67 version the other guy posted in this thread, and its still not working, no network signal at all (0 dbm 99 asu), i realised i have the same baseband and kernel version with yours although i use a c6602. its global_hspa though.what do you think i should do next please. thanks

mibz said:
hi, i jst re flashed with the 2.67 version the other guy posted in this thread, and its still not working, no network signal at all (0 dbm 99 asu), i realised i have the same baseband and kernel version with yours although i use a c6602. its global_hspa though.what do you think i should do next please. thanks
Click to expand...
Click to collapse
Try to flash full firmware, because you don't have signal at all, maybe could be hardware issue. Cultural question, You try your sim card in another phone, don't you?

Okay I eventually found out what the problem was.it's a hardware problem, connection of the antenna near the vibrator, bottom right when lookin at back of phone was loose.thanks to all who posted suggestions.eventually opened it myself.

Related

[Q] Has anyone updated C6602 to new firmware 10.1.A.1.434 ????

Hi .. did anyone update 10.1.A.1.434 on C6602?
I see in sony website the above as latest firmware; but I am unable to see any update on my phone with sony PC companion or over the air!!
Is it normal? or do i have to do anything more???
I got the update yesterday.
Couples of days before i uninstall pc companion and deleted all sony stuff from /programs.... On my pc.
Sent from my C6602 using xda premium
Updates goes out in intervals, I just got e-mail from sony. You will get an update, no worries
Save yourself the trouble and flash the FTF as for the ROM, no big changes, mostly under the hood stuff
My friends upgrade with 6603 firmware, and the network setting have lte menu but he cant try at he country, its true 6602 flash with 6603 firware can use lte?
st3v3n_lee said:
My friends upgrade with 6603 firmware, and the network setting have lte menu but he cant try at he country, its true 6602 flash with 6603 firware can use lte?
Click to expand...
Click to collapse
6602 does not support LTE.
However 6603 and 6602 can use the same firmware.
I do not think flashing this firmware to a 6602 will make it magically support LTE.
Kind regards, Stefan.
Thaevil0ne said:
6602 does not support LTE.
However 6603 and 6602 can use the same firmware.
I do not think flashing this firmware to a 6602 will make it magically support LTE.
Kind regards, Stefan.
Click to expand...
Click to collapse
Yes, i also think so
But the hardaware between 6602 and 6603 was no different,
Has anyone tried it?
Funny that my XZ was C6603 (Singapore). The phone change to C6602 after I flash Thai stock rom. I will try to flash original stock rom back again. I will inform later for how it can change back to C6603 or not.
ramvvs said:
Hi .. did anyone update 10.1.A.1.434 on C6602?
I see in sony website the above as latest firmware; but I am unable to see any update on my phone with sony PC companion or over the air!!
Is it normal? or do i have to do anything more???
Click to expand...
Click to collapse
BEEE Patient
hi
I am using c6602 I got the update two days ago
styguan said:
I am using c6602 I got the update two days ago
Click to expand...
Click to collapse
Me tooo
I Got the update today
I got it today.what is changed in new 434?
Sent from my C6602 using Tapatalk 2
Where are you from guys? ))) I've tried all the methods and says that I'm up to date (350 here).
Bought the phone from Vodafone Romania.
Will the update be served ota or updating via pc companion is the only option ?
kanishkgaur said:
Will the update be served ota or updating via pc companion is the only option ?
Click to expand...
Click to collapse
I got it ota.can anyone give me change-log?
I believe my screen has bettered
Sent from my C6602 using Tapatalk 2
kanishkgaur said:
Will the update be served ota or updating via pc companion is the only option ?
Click to expand...
Click to collapse
I think the update is only throw pc companion, when I tried through WiFi it doesn't show any update

Baseband vs Region

Hey,
first of, sorry if this has already been asked (and answered..) But I tried my best searching all the sub-forums.
Anywho.
I'm not sure if I am imagining this or not, but after updating to 253 my wireless and cell reception has become worse. Albeit I have quite poor reception in the basement, but the phone looses mobile and/or wireless connection all the time (and I'm positive it didn't do that before, at least).
I have tried both the Indian version and the Swedish version, but they both have the same baseband, i.e 9x15A-ACEFWMAZQ-30110041-23. I am located in Norway, but I figured the baseband will at least be the same for both Sweden and Norway(?). I have not looked at the 'Nordic' version yet tho.
I have not checked if the baseband of 434 and 253 actually differ, but I'm thinking they do. Currently I'm running Carbonrom, so the question is, is it possible to flash just the baseband of 434 onto Carbonrom (provided they're not the same that is..) and should I try to find the Norwegian-specific ftf?
I've been doing nothing but flashing different roms these last days and I think I'm going to cough up hairballs if I have to re-install and customize the rom to my liking, yet again. So I just want to be sure before doing anything (un)risky..
regards,
me
Yes you can flash the baseband separately with flashtool.
And yes 434 has different baseband than the new update.
Sent from my C6603 using xda premium
gm007 said:
Yes you can flash the baseband separately with flashtool.
And yes 434 has different baseband than the new update.
Sent from my C6603 using xda premium
Click to expand...
Click to collapse
Well I tried flashing both a baseband from 434 UK version and 434 Swedish version, but it has not changed.. Is there anything else than flashing the baseband from flashtool I should know about?
avelon said:
Well I tried flashing both a baseband from 434 UK version and 434 Swedish version, but it has not changed.. Is there anything else than flashing the baseband from flashtool I should know about?
Click to expand...
Click to collapse
Yes you done it correctly but you wont see the difference in "about phone".you need to change some system files to get the right info but not necessary.
All you have to do now is checking if you have better signal and connectivity or not.
Sent from my C6603 using xda premium

[Q] Xperia ZR C5503 Android 4.3 update LTE selection in mobile networks gone

Hi guys! So I updated my phone using the PC companion to the latest android 4.3 made available here in the middleast region and I'm wondering how come my LTE selection is gone from the mobile networks selection. Anybody else having the problem? I'd also like to know is anybody tried flashing a different Rom region firmware and fixed the bug. Thanks in advance!:fingers-crossed:
ignaciopaolo33 said:
Hi guys! So I updated my phone using the PC companion to the latest android 4.3 made available here in the middleast region and I'm wondering how come my LTE selection is gone from the mobile networks selection. Anybody else having the problem? I'd also like to know is anybody tried flashing a different Rom region firmware and fixed the bug. Thanks in advance!:fingers-crossed:
Click to expand...
Click to collapse
I don`t have this problem, but i didn`t update via pc companion , i flashed the new 4.3 FTF with flashtool ..anyway if your phone is branded and/or you don`t have 4G on your carier you may not have LTE on network selection .. Sorry for my english ..
Yeah thanks! I downloaded the nordic rom for my c5503 and then flashed it. Happy to see that the LTE connection choice is back. Must be a c5502 software that was realeased for the middleeast version. Thanks anyway!
Sent from my C5503 using xda app-developers app

[Q] Sony Xperia Z1 Unknown IMEI/Baseband. Any solution?

I purchased the phone on eBay the other day however I cannot make/receive calls as there is no network signal nor WiFi. I found out that the IMEI and Baseband are missing and UNKNOWN. I made some research and apparently I need an EFS backup. I have no backups whatsoever as bought the phone from second hand just a while ago. I reflashed it using the flashtool but it didn't resolve my issue. Is there ANY way at all to fix Sony Xperia Z1 IMEI and Baseband? ANY at all other than going to the Sony Repair Service and ... replacing the motherboard which would cost same as the new phone. I would really appreciate any advice, help and some useful links!
Many thanks
kali92uk said:
I purchased the phone on eBay the other day however I cannot make/receive calls as there is no network signal nor WiFi. I found out that the IMEI and Baseband are missing and UNKNOWN. I made some research and apparently I need an EFS backup. I have no backups whatsoever as bought the phone from second hand just a while ago. I reflashed it using the flashtool but it didn't resolve my issue. Is there ANY way at all to fix Sony Xperia Z1 IMEI and Baseband? ANY at all other than going to the Sony Repair Service and ... replacing the motherboard which would cost same as the new phone. I would really appreciate any advice, help and some useful links!
Many thanks
Click to expand...
Click to collapse
Are you on the newest firmware with Android 4.3? Imei can be lost when you someone downgrades from 4.3 to 4.2.2. It should come back once you get back on the new firmware.
Try a few 4.3 FTF's and see if it solves the problem.
http://forum.xda-developers.com/showthread.php?t=2469191
shem2409 said:
Are you on the newest firmware with Android 4.3? Imei can be lost when you someone downgrades from 4.3 to 4.2.2. It should come back once you get back on the new firmware.
Try a few 4.3 FTF's and see if it solves the problem.
http://forum.xda-developers.com/showthread.php?t=2469191
Click to expand...
Click to collapse
Yes, I'm on the newest firmware with Android 4.3. I reflashed it with C6903 14.1.G.2.257 Global 1277-2880, still no luck. IMEI and Baseband unknown .. eh. Any other solution?
Thanks
kali92uk said:
Yes, I'm on the newest firmware with Android 4.3. I reflashed it with C6903 14.1.G.2.257 Global 1277-2880, still no luck. IMEI and Baseband unknown .. eh. Any other solution?
Thanks
Click to expand...
Click to collapse
Try flashing one of the. 290 firmwares. 257 is the old 4.2.2 firmware. Have you tried to do a repair via PC Companion or Sony Update Service? Google it, download the software and try the repair.
Sent from my C6903 using Tapatalk
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shem2409 said:
Try flashing one of the. 290 firmwares. 257 is the old 4.2.2 firmware. Have you tried to do a repair via PC Companion or Sony Update Service? Google it, download the software and try the repair.
Sent from my C6903 using Tapatalk
Click to expand...
Click to collapse
I installed the Polish version, C6903 14.2.A.0.290 Generic PL 1276-4318_R1B MIRROR but had the same issue. Then I tried the repairs via PC Companion and Sony Update Service, and unfortunately nothing changed. I reflashed it again with UK version, C6903 14.2.A.0.290 Generic UK 1276-0875 MIRROR and nothing happened. The phone works normally but still it can't read the SIM card etc. As you can see on the screendumps attached there is no effect after installing any firmware or repairing it whatsoever. Is there anything else I could try?
Many thanks
I have the same problem. Xperia resets on 4.2.
I updated to 4.3 using flashtoola, lost through this IMEI, BASEBAND. WIFI DOES NOT WORK. Help: (
kali92uk said:
View attachment 2607711
View attachment 2607712
View attachment 2607713
I installed the Polish version, C6903 14.2.A.0.290 Generic PL 1276-4318_R1B MIRROR but had the same issue. Then I tried the repairs via PC Companion and Sony Update Service, and unfortunately nothing changed. I reflashed it again with UK version, C6903 14.2.A.0.290 Generic UK 1276-0875 MIRROR and nothing happened. The phone works normally but still it can't read the SIM card etc. As you can see on the screendumps attached there is no effect after installing any firmware or repairing it whatsoever. Is there anything else I could try?
Many thanks
Click to expand...
Click to collapse
Mateuszeky said:
I have the same problem. Xperia resets on 4.2.
I updated to 4.3 using flashtoola, lost through this IMEI, BASEBAND. WIFI DOES NOT WORK. Help: (
Click to expand...
Click to collapse
Usually flashing the same firmware that you were on in the begining should fix the problem. All I can advise you is to try a few firmwares (same version and same localization) that you have had in the beginning with same android and build version. Try it until it comes back. It has to come back eventually.
The firmware is usually lost when you downgrade from 4.2 to 4.3. Once you upgrade to 4.3 it should return to the normal state. Are you sure that you are flashing firmware builds for your model number?
C6903 on C6903 etc.
shem2409 said:
Usually flashing the same firmware that you were on in the begining should fix the problem. All I can advise you is to try a few firmwares (same version and same localization) that you have had in the beginning with same android and build version. Try it until it comes back. It has to come back eventually.
The firmware is usually lost when you downgrade from 4.2 to 4.3. Once you upgrade to 4.3 it should return to the normal state. Are you sure that you are flashing firmware builds for your model number?
C6903 on C6903 etc.
Click to expand...
Click to collapse
Thank you for the quick reply. Znam Polski. : )
IMEI - "Unknown"
I do not know what Rom was before the upgrade to 4.3
On the box it says. Si 1276-2646 DE.
This Rom 4.3 which I flash "C6903_14.2.A.1.136_1276-4314 R1B Central Europe.ftf"
Probably the then everything disappeared.
Then I flash ".257> .290> .534"
Nothing has changed, I used an update by SUS.
SUS Flash Rom ".136" appeared restarts.
I went back to ".290"
I typed in Google Si 1276-2646 DE, I found Rom "C6903_14.1.G.1.518_GenericDE.ftf" thinking it was the "first". Unfortunately appeared bootloop. I had to go back to the ".290"
do you have the C6902 or the C6903?
I have a friend who had same case like yours, he contacted me on my gmail account, and i told him to check with variant he has... he was flashing C6903 but his phone was the C6902. however, this didn't solve his problem, so I told him u need to find a C6902 firmware ROM that came flashed in phone first time out of the box. eventually, he flashed his Z1 a C6902firmware which matches his phone network fuctions, and BAM.. IMEI and BASEBAND back to life with network and also WIFI.
just check your phone model and make a try, it worth it...
here is the thread bro:
http://forum.xda-developers.com/showthread.php?p=51186062
Good luck
for the label, check the attachment below:
I also facing the same problem here.My phone lost Imei no. & unknown baseband version after update to android 4.3 recently.
Nidhal AKA the king said:
is your phone the C6903 or the C6902.. to check this info , open sim card flap, take off sim & sim tray, under it, there is a label, grab it and u will get all the information about ur phone model!
u need to flash the same ROM came in your phone when u first unboxed It!
check the SI number and make an initial flash with the correct ROM...
for the label, check the attatchment below:
Click to expand...
Click to collapse
The official update 4.4 restore IMEI & BASEBAND! !
I have problems with the registration cards in the network, but sometimes it succeeds, and then I can't call and send text messages.
Mateuszeky said:
The official update 4.4 restore IMEI & BASEBAND! !
I have problems with the registration cards in the network, but sometimes it succeeds, and then I can't call and send text messages.
Click to expand...
Click to collapse
not all the cases succeed, depend if its a H/W problem, then it's hardbricked phone!
but maybe the latest update would fix this issue, not sure thou, because It was even worse from 4.2.1 to 4.2.2 or 4.3.
kali92uk said:
I purchased the phone on eBay the other day however I cannot make/receive calls as there is no network signal nor WiFi. I found out that the IMEI and Baseband are missing and UNKNOWN. I made some research and apparently I need an EFS backup. I have no backups whatsoever as bought the phone from second hand just a while ago. I reflashed it using the flashtool but it didn't resolve my issue. Is there ANY way at all to fix Sony Xperia Z1 IMEI and Baseband? ANY at all other than going to the Sony Repair Service and ... replacing the motherboard which would cost same as the new phone. I would really appreciate any advice, help and some useful links!
Many thanks
Click to expand...
Click to collapse
Try NUTs Downgrading to a 4.2 ROM.
It might be too late but try it.
I have the same problem but I try to flash PACman ROM 4.3.
I tried to flash baseband from stock Sony ROMs .136 and .290 but my IMEI is still 00000000 and I can't connect to network :/
Nidhal AKA the king said:
not all the cases succeed, depend if its a H/W problem, then it's hardbricked phone!.
Click to expand...
Click to collapse
How the phone still turning on if it's Hard Bricked?
eclyptos said:
How the phone still turning on if it's Hard Bricked?
Click to expand...
Click to collapse
H/W problem or Hardbricked depend on the phone's issue in which it was hardbricked. in some cases it can still make the phone turn on if it's related radio functionality , cuz It could be the modem or Chip. like imei and baseband problem.
Nidhal AKA the king said:
H/W problem or Hardbricked depend on the phone's issue in which it was hardbricked. in some cases it can still make the phone turn on if it's related radio functionality , cuz It could be the modem or Chip. like imei and baseband problem.
Click to expand...
Click to collapse
Hardbrick means it cant turn on.
gregbradley said:
Hardbrick means it cant turn on.
Click to expand...
Click to collapse
ok thanks! :good:
An update of Sony Xperia Z1 to Android KitKat 4.4.2 14.3.A.0.681
Thanks for all the help so far!!! Recently I have reflashed my device to 14.3.A.0.681 Journalist&Commercial latest Android version and suddenly the IMEI and Baseband show up this time, and Wi-Fi works!. However I still got no network service (tried 3mobile and T-mobile; the phone does not ask for any unlock code). It freezes when turning the camera on :/ How to fix this? Is it still the software problem or something else?
View attachment 2664307View attachment 2664306
kali92uk said:
Thanks for all the help so far!!! Recently I have reflashed my device to 14.3.A.0.681 Journalist&Commercial latest Android version and suddenly the IMEI and Baseband show up this time, and Wi-Fi works!. However I still got no network service (tried 3mobile and T-mobile; the phone does not ask for any unlock code). It freezes when turning the camera on :/ How to fix this? Is it still the software problem or something else?
View attachment 2664307View attachment 2664306
Click to expand...
Click to collapse
See the network providers about the no service.
Clear data for all camera apps in settings

Xperia SP c5302 : tinkering with *#4636 results in loss of network

HI
I have an xperia SP C5302, running on the factory version of 4.1 (No custom ROM, not yet updated)
I recently wanted to check if my phone has LTE support using *#*#4636#*#*, there i did find an option called LTE only in the network, i had a 4G sim inserted as well, but neither 3G nor 4G was coming on that phone , it was in EDGE for Idea bengaluru.
Note: I always use DOCOMO and i do get H+ signals(3G) in it.
Coming to my current problems, after changing and selecting couple of network (LTE/WCMA/EvDO/GSM, etc) and also playing with the "Change Band Settings"---Selecting USA BAND(the only one shown in the option) and performing a restart, my phone is unable to catch a signal at all.No network is being shown, even a manual network search initiation fails .I tried selecting "GSM only" as well..but no help:crying::crying: Please help me to restore my phone guys....)
C5302 does not support LTE. You may need to flash the stock ROM again to fix this issue. Since you're stock, use Xperia Companion for this matter
I have the same issue mmm my c5302 has 207 firmware
iaxperia said:
I have the same issue mmm my c5302 has 207 firmware
Click to expand...
Click to collapse
Try this fix:
http://forum.xda-developers.com/showthread.php?t=2865378
Sent from my Xperia SP using Tapatalk
Pretty much what the guys said. Xperia Companion repair is the easiest method if you are newbie

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