SGP321 looses gsm signal - Xperia Tablet Z Q&A, Help & Troubleshooting

I bought this tablet 2 months ago in our local t-mobile. And everything was fine until 2 weeks ago when it suddenly started loosing gsm signal.
At first i thought it had something to do with me rooting it. So i tried repairing it 2 times but with no luck. After that i tried downgrading to 4.1.2 and that didn't work either.
So basically i can be online (surfing,downloading etc.) for few minutes before it drops gsm signal (no signal icon in statusbar) and after few minutes it comes back and then it drops again...
I'd like to know if it can be fixed without taking it to nearest sony repair service. Did anyone encounter similar problem and manage to fix it?
btw bootloader is locked (unlock allowed: no) so flashin another kernel/ROM is out of the question...

wh15tler said:
I bought this tablet 2 months ago in our local t-mobile. And everything was fine until 2 weeks ago when it suddenly started loosing gsm signal.
At first i thought it had something to do with me rooting it. So i tried repairing it 2 times but with no luck. After that i tried downgrading to 4.1.2 and that didn't work either.
So basically i can be online (surfing,downloading etc.) for few minutes before it drops gsm signal (no signal icon in statusbar) and after few minutes it comes back and then it drops again...
I'd like to know if it can be fixed without taking it to nearest sony repair service. Did anyone encounter similar problem and manage to fix it?
btw bootloader is locked (unlock allowed: no) so flashin another kernel/ROM is out of the question...
Click to expand...
Click to collapse
Have you tried factory resting it ? Also you can unlock the boot loader just search xda im sure ive seen a guide somewhere ? i was going to say take it back to Sony as it might be a hardware problem but since you have rooted it your warranty has been voided...

N1NJATH3ORY said:
Have you tried factory resting it ? Also you can unlock the boot loader just search xda im sure ive seen a guide somewhere ? i was going to say take it back to Sony as it might be a hardware problem but since you have rooted it your warranty has been voided...
Click to expand...
Click to collapse
Well firmware flashing via SUS repair option usually does that for me.. but yeah, i tried factory reset as well. And about bootloader unlocking i've been searching for a guide ever since i bought it. No such luck... Apparently if it's "bootloader unlock allowed: NO", it's meant to stay that way. At least until someone finds a way around it.
I've got a vague idea about how does rooting work and that tells me if i did a complete wipe and flashed my tablet, how can they detect it?
I mean.. it's a complete reinstall, how are they supposed to know that the tablet was rooted on previous firmware if it currently isn't?

wh15tler said:
Well firmware flashing via SUS repair option usually does that for me.. but yeah, i tried factory reset as well. And about bootloader unlocking i've been searching for a guide ever since i bought it. No such luck... Apparently if it's "bootloader unlock allowed: NO", it's meant to stay that way. At least until someone finds a way around it.
I've got a vague idea about how does rooting work and that tells me if i did a complete wipe and flashed my tablet, how can they detect it?
I mean.. it's a complete reinstall, how are they supposed to know that the tablet was rooted on previous firmware if it currently isn't?
Click to expand...
Click to collapse
Well im no pro, but don't they have some kind of binary counter witch tells the manufactures the devices has been rooted ? i know that's how Samsung goes about identifying if the devices has been rooted... But Sony im not too sure, Also your theory does hold ground, if you clean install from the ground up then Sony shouldn't be able to tell, if the device has been rooted, also you do know that Sony have a guide on there website on how to unlock the boot loader ? Here check it out http://developer.sonymobile.com/services/unlock-bootloader/

N1NJATH3ORY said:
Well im no pro, but don't they have some kind of binary counter witch tells the manufactures the devices has been rooted ? i know that's how Samsung goes about identifying if the devices has been rooted... But Sony im not too sure, Also your theory does hold ground, if you clean install from the ground up then Sony shouldn't be able to tell, if the device has been rooted, also you do know that Sony have a guide on there website on how to unlock the boot loader ? Here check it out...
Click to expand...
Click to collapse
I know about that website. That's how i unlock every sony i come across that needs unlocking :laugh:
But it also says if the "Bootloader unlock allowed" is NO in service menu, then there is no hope for unlocking the bootloader. At least not officially.. until someone comes with a solution for that..

So i managed to get some extra details on that problem.
Apparently i can't get LTE signal anywhere. And when i get LTE, connection automatically drops.
Could it be that the LTE chip is faulty? Does that mean that i'll probably get another device... because somehow i doubt that theyll try to replace the motherboard

Related

[Q] Problems with SIM Unlock

Hey Guys,
Hopefully someone can help me out since I can't seem to find answers anywhere to my problem. I got an unlock code from T-Mobile but when I put a foreign sim into the phone is says "invalid sim, 0 attempts remain". I got the phone on craigslist so I'm guessing whoever had it before me tried unlocking it with the wrong code too many times. I have the right code now, how do I reset the attempts? I can't believe that the phone is hard locked and there isn't anything I can do about it. It's pretty frustrating so any help would be appreciated!
Thanks!!!
really???? no one knows anything about this issue?
So people here know how to put different operating systems on phones but no one knows if it is possible to reset the sim unlock counter?????
the phone is hard locked and (certainly in most cases) can now only be unlocked by using a hardware unlocker. (for most phones, you get three attempts via the keypad, and a further 10 via a hardware connection normally.)
thanks for the reply! what exactly does hardware unlocking mean? would i still need to use the code given to me by t-mobile?
speak to a phone shop (or better yet speak to t mobile first)
have you tried to restore the phone to factory(not a hard reset). I would try going to Tmobiles website and try to update the rom...
http://dl.htc.com/ruudownload/t-mobileUS/DeviceDownloads.aspx?pid=leo
^is for US phones I just did mine today because the guy that put android on it removed the unlock screen and I was unable to unlock the phone. And no one on here was able to answer any questions for me so don't feel bad.
Got it unlocked last night! turns out the sim card i was using was locked. i tried a different one and it let me key in the code. thanks for all the help!
now that the phone is unlocked would doing a hard reset lock it back up?
azmpire said:
now that the phone is unlocked would doing a hard reset lock it back up?
Click to expand...
Click to collapse
good stuff. No, flashing / hard resets will not ever lock the phone now.

[Solved]Help me delete data

Hey everybody,
I just got the x10 today and I've never hacked a Sony so I know nothing about it right now, so forgive my ignorance.
The phone was used and didn't come with a sim card. I've put 2 different sim cards in it that I know are good, but when I boot up it gives me a sim card error and only let's me make an emergency call.
I'm thinking that because his data is on it, it needs his sim card? I have always had cdma phones so sim cards are new to me also.
My question is... Is their a way to get into some kind of boot menu by a button combination at startup or something, where I can delete the phone data?
Any help is appreciated.
Edit... Phone is stock, not rooted, yet
Dude,it seems ur phone is sim locked and u can't use any sim card beside sim card ov network operator that locked ur phone.
Sent from my "z10i"
neoxx3m said:
Dude,it seems ur phone is sim locked and u can't use any sim card beside sim card ov network operator that locked ur phone.
Sent from my "z10i"
Click to expand...
Click to collapse
How would that happen? The phone is legit, no outstanding bill on that account and its not stolen. Are you saying I need his sim card to unlock it so I can use another?
Just to give you more info, when the lockscreen comes up, it says "sim card is faulty" but if I hold power and select airplane mode, then turn off airplane mode, it let's me past the lockscreen and then I get a toast box that says "sim is not provisioned mm2"
The phone was on at&t when it was used. I don't have an at&t acct. For now I just want to learn about it and root/mod it. Maybe ill call at&t.
Might be another issue :
Some anti-theft antivirus programs are able to lock your phone for your sim-card only (to prevent using another sims when phone is stolen).
If its set as device-manager, it also cant be disabled (requires some password).
So, try to boot up your phone without SIM card ant check this first. If device-manager is not set, then your phone is surely simlocked.
Thanks for the reply, I've tried booting up without a sim card and it gives me an error that no sim is installed and will only let me make an emergency call.
I called at&t last night and the rep asked me to hold the menu + return buttons while pressing power and I should get an option to hard reset the phone. That didn't work so she patched me to Sony. They had me download Sony pc companion and sent me instructions to "repair" it.
He said it was 1 of 2 problems. It's a "software glitch" or a broken sim port.
If the repair won't fix it, ill have to send it in and for $185 they'll fix it (yeah right). When I get home ill try the pc companion. This phone is in mint condition and was fully working before the guy that gave it to me went to an iPhone.
wikdNoob said:
Thanks for the reply, I've tried booting up without a sim card and it gives me an error that no sim is installed and will only let me make an emergency call.
I called at&t last night and the rep asked me to hold the menu + return buttons while pressing power and I should get an option to hard reset the phone. That didn't work so she patched me to Sony. They had me download Sony pc companion and sent me instructions to "repair" it.
He said it was 1 of 2 problems. It's a "software glitch" or a broken sim port.
If the repair won't fix it, ill have to send it in and for $185 they'll fix it (yeah right). When I get home ill try the pc companion. This phone is in mint condition and was fully working before the guy that gave it to me went to an iPhone.
Click to expand...
Click to collapse
Might be both - hardware malfunction or simple simlock. Personally expect simlock. My phone is not simlocked and when turned on it can run without sim card simply as PDA.
Try to flash your phone with generic WWE ROM and try again. Or before, check if phone doesnt have usb debugging on.
Afraid that no, but try to look with flashtool or adb (if yes, we can make full wipe within xrecovery)
HeliumX10 said:
Might be both - hardware malfunction or simple simlock. Personally expect simlock. My phone is not simlocked and when turned on it can run without sim card simply as PDA.
Try to flash your phone with generic WWE ROM and try again. Or before, check if phone doesnt have usb debugging on.
Afraid that no, but try to look with flashtool or adb (if yes, we can make full wipe within xrecovery)
Click to expand...
Click to collapse
If its sim locked then I'd think that I could use the previous owners sim to get into the system, right? Then how do I sim unlock?
I can't check for USB debugging because I can't get past the emergency call only screen.
I've got the pc companion downloaded on my working phone, when I get home I a couple of hours I'm gonna xfer it to the comp and run it, hopefully that'll fix it. If not, ill wait till Monday and get the previous owners sim and try that. If that doesn't work.... I'm gonna get the night vision goggles back that I traded for this phone, lol.
Running this phone without a sim is exactly what I want, just as a pda. How'd you do it, or better yet, what it called, sim unlocking? I can look for a guide, but I don't even know what its called. I feel really dumb about this phone, sorry bout that, if you came to the evo3d forum I could give you all the help you needed.
wikdNoob said:
Running this phone without a sim is exactly what I want, just as a pda. How'd you do it, or better yet, what it called, sim unlocking? I can look for a guide, but I don't even know what its called.
Click to expand...
Click to collapse
OK then If you want to use your phone as pda, without gsm or data connection, then the simpliest thing you can do is to flash stock generic ROM (you dont have to care about baseband and so on).
However you need to do a sim-unlock first because otherwise it will be still locked on the operator. Heart about many unlocking methods on websites, eg. this one (really expensive):
http://www.mobile-unlocker.com/sony-ericsson-xperia-x10/rs2wp9/
Never tried (always buying phone without sim-lock).
What operator is your phone locked?
YOu probably have to google about your exact operator locked version, hopefully you will find unlocking code or online service for it.
BAM! I got it, thanks for all your help. I used the pc companion and chose repair, I lost all data but that's ok, I was gonna erase data anyway. When I boot up it still gives me a notif that the sim is not provisioned but I can still get into the system.
Time to start hacking away at this thing, I've got a lot to learn I'm sure. I downloaded flashtool and it says it'll root so I'm gonna try that. I'm open to any more help you can give out, you probably think that some of the easy stuff is common knowledge but even the smallest stuff will help me get started. I'm gonna start reading in the sticky section, thanks again for the replies.
Also, after the repair, I have a different lockscreen, it looks like an iPhone lock kinda. Before, I had the lock that went up and right on a curve kinda, how do I get back to that one?
wikdNoob said:
Also, after the repair, I have a different lockscreen, it looks like an iPhone lock kinda. Before, I had the lock that went up and right on a curve kinda, how do I get back to that one?
Click to expand...
Click to collapse
Now i understand why you wasnt able to get into system without sim You were on old android 1.6 which was default OS when X10i was released. But there were two big software updates - 2.1 and last year our beloved 2.3.3.
Thats why you have different lockscreen. In 1.6 it was shaped like half-circle, in 2.3 its just a simple horizontal slide... But there is not any solution how to get this lockcreen back as I know. BTW.: Also liked the old one lockcreen
Everytime you will need a help, post and we will surely help you !!
HeliumX10 said:
Thats why you have different lockscreen. In 1.6 it was shaped like half-circle, in 2.3 its just a simple horizontal slide... But there is not any solution how to get this lockcreen back as I know. BTW.: Also liked the old one lockcreen
Click to expand...
Click to collapse
Ok, I'm starting to get it now... My system info says
Firmware version 2.1-update1
Baseband 2.1.65
Kernel 2.6.29
So far I've rooted, installed xrecovery and unlocked the bl. All the roms I've looked at say I need a higher baseband to use that rom. Can I use the pc companion to update to 2.3.3, and is it gonna cause an issue since I have a custom recovery and unlocked bl? The reason I ask is because on an LG I had, it would brick if you did an official update with a custom recovery.
wikdNoob said:
My system info says
Firmware version 2.1-update1
Baseband 2.1.65
Kernel 2.6.29
Click to expand...
Click to collapse
Ohh, branded phones are really loosers It seems that your version wasnt updated to 2.3.3, on which are based all roms for X10i and X10a.
wikdNoob said:
So far I've rooted, installed xrecovery and unlocked the bl. All the roms I've looked at say I need a higher baseband to use that rom. Can I use the pc companion to update to 2.3.3, and is it gonna cause an issue since I have a custom recovery and unlocked bl? The reason I ask is because on an LG I had, it would brick if you did an official update with a custom recovery.
Click to expand...
Click to collapse
I recommend you to use Flashtool intead There are problems to get the ftf file with generic ROM, which also includes .71 baseband which is surely needed for any custom ROM. But I think this is simplier solution. If you want active link to FTF bundle I will post it (also with guide, already wrote it for another users).
You can also use PC Companion, and it surely dont affect your phone in any way. If you rooted it and installed xrecovery its surely not problem (I performed this once on my device). Dont know about unlocked bootloader (dont have it and dont want to have it ), but think thats also not problem.
You can brick X10i only if you flash kernel and something unexpected happens (cable unplug etc...).
Wow, 200th post - will celebrate my anniversary
HeliumX10 said:
Ohh, branded phones are really loosers It seems that your version wasnt updated to 2.3.3, on which are based all roms for X10i and X10a.
I recommend you to use Flashtool intead There are problems to get the ftf file with generic ROM, which also includes .71 baseband which is surely needed for any custom ROM. But I think this is simplier solution. If you want active link to FTF bundle I will post it (also with guide, already wrote it for another users).
You can also use PC Companion, and it surely dont affect your phone in any way. If you rooted it and installed xrecovery its surely not problem (I performed this once on my device). Dont know about unlocked bootloader (dont have it and dont want to have it ), but think thats also not problem.
You can brick X10i only if you flash kernel and something unexpected happens (cable unplug etc...).
Wow, 200th post - will celebrate my anniversary
Click to expand...
Click to collapse
Got it, I installed DiXpreia 7 'avenger' using xrec for Rom and flashtool for the ftf file. wow, what a difference in graphics, this is cool.
I appreciate all the time you've spent on me. Congrats on the 200th, I'm helping you stack up some thanks' too
One last thing, what's the benifit of an unlocked bl? And would it benifit me to unbrand since I have a custom Rom?
wikdNoob said:
I appreciate all the time you've spent on me. Congrats on the 200th, I'm helping you stack up some thanks' too
Click to expand...
Click to collapse
Haha, thanks bro !
wikdNoob said:
One last thing, what's the benifit of an unlocked bl? And would it benifit me to unbrand since I have a custom Rom?
Click to expand...
Click to collapse
For unlocked bootloader there is only one main benefit. You can flash any custom kernel directly. On locked bootloader you can also use custom kernel, but it uses "bypass" method - once stock kernel is loaded, special init script gives the control to custom kernel and then custom kernel is loaded. This is 100% safe for noobs and also devs (I was doing some kernelt tweaks, thats why I am on locked - if I do unloadable kernel and flash it on unlocked device... It will be bricked ). But it takes about 2x time to load the system on reboot, because you need to load two kernels instead just one. If you unlock your bootloader, you can overwrite stock kernel with custom one. And when device it powered on, custom kernel is loaded directly and loads faster then by "bypass" method. Another "benefit" is that all of CyanogenMod ROMs requires unlocked bootloader
Unlocked bootloader doesnt affect your "brand", it wont remove it. As wrote before, you need some service which offers unlocking codes or I saw saome tutorials on youtube (give a search ).
But think this is a little nonsense if you want to use your phone as PDA. "Branding" affects only gsm network and 3G data, so you cant use these features without SIM.
Thanks for the info on the locked/unlocked bl.
Now for another question. Let's say I install a Rom and kernel combo that aren't compatible, you said it'll brick. Will that be a hard/permanent brick or could I just use the pc companion and repair it.
wikdNoob said:
Thanks for the info on the locked/unlocked bl.
Now for another question. Let's say I install a Rom and kernel combo that aren't compatible, you said it'll brick. Will that be a hard/permanent brick or could I just use the pc companion and repair it.
Click to expand...
Click to collapse
On locked bl you can everytime use Flashtool or PC Companion to reapir your phone.
On unlocked mostly too. BUT, as told you. Only if you flash loader or kernel badly (bad cable, unexpected power shutdown etc.) you cant repair your phone with any software. Or, to be perfectionist You can unbrick it, using the "JTAG" connector with some "JIG" box. These hardware are hard to buy, its highly specialized devices and costs about 200€ or even more... With these tools you can unbrick any device everytime, even with damaged system ROM, or unloadable kernel. It will simply overwrite the whole NAND adress by adress, byte by byte with standart system image.
You can also use some high-level services which are equipped with this hw and could do it for you. But its also expensive.BTW. thats why I am thinking about to buy JIG box perosnally

please help with unlocking (i got it as a gift)

I bought an atrix 4g mb860 with the lapdock locked to at&t.. latest android version 2.3.6..
I live in egypt..
first I called at&t asked for the unlock code, they gave it to me.
didnt work the unsuccessful
then i called again to make sure of the code but unfortunately they gave me the same code. they suggested i would call motorola
i called motorola they guided me to make a factory reset but did not solve the problem.
i unlocked the phone root
instal cwm
flashed diff radios
didnt help
flashed back 2.3.4
nothing yet
tried diff radios again
tried CM7.2
nothing worked
finaly i sent it to a repair shop
they said they were unable to unlock it.
now i do not know what to do????
i was thinking maybe doing advanced hacking to the software may help.
or eveeen changing the motherboard.. i thought of going to motorola asking them to replace the motherboard for me...
i want to know where does this ****en lock code is.. it is like a ghost i replaces software and boot loader where is that memory that hold the lock code and make it functionable on every software...
You're trying to sim unlock your phone, right? It's not a bootloader unlocking, i guess...
yes
Yeah, I'm not sure where the SIM lock code is either, but it is definitely not within the bootloader or boot or the ROM area. I think it might not be user-accessible at all. It's not like on Samsungs where you modify a file and that makes it unlocked.
ravilov said:
Yeah, I'm not sure where the SIM lock code is either, but it is definitely not within the bootloader or boot or the ROM area. I think it might not be user-accessible at all. It's not like on Samsungs where you modify a file and that makes it unlocked.
Click to expand...
Click to collapse
I believe this is correct, I doubt it's in user accessible files. I'm no expert but if I had to guess it would be built into the firmware or a separate; small chip for storage that is inaccessible. It is only accessible via kernel probably, so it's very low level. Just a guess.
EDIT:
http://en.wikipedia.org/wiki/SIM_lock#Unlocking_technology Here is a decent read if anyone is interested.
anyyy ideas for solving this problem... other than throwing the device in the recycling bin

Seems Bricked :)

Hi Guys,
My xperia mini pro was acting kinda wierd lately with the phone getting stuck while using the slider keyboard. This went on for a day and then the speaker on the phone stopped working and i was forced to use the headset for all calls. Then the very next day, the display went off completely. I have not rooted the phone and its on stock OS. Bootloader is locked too.
I used the search option and found this link which almost completely explains my issue http://forum.xda-developers.com/showthread.php?t=1918271
Did as told there, SUS did find my phone and i could reinstall the OS, but it still didnt bring back the display.
So i m off to service center to get the flex cable changed.. :good: wonder y they make this thing so, if the cable damage is almost certain.
My q. is can i unlock my bootloader once the phone arrives from service? I am on 11W49. Had seen a similar thread saying anything after 11w29+ will brick the phone, but it was for Xperia X8. I am using the Xperia mini pro, will it brick the phone? i wanted to load MiUi on it
Unlock it using the official method by sony and it won't brick
If you want to know how to do this, read my guide on how to unlock the bootloader
Sent from my Nexus 4 running Android 4.3
Thanks mihahn,
Will do it once i get it back from service.
The issue of hard bricking would be applicable to X8 alone i suppose.
U can also try unlock it using test poin method. My XMP is 12W07 and everything went fine. But U must be sure, that in service menu under rooting status is Bootloader unlock allowed: yes Otherwise U won't be able to unlock bootloader for free

Dead Moto Z!

Last thing i remember is my phone restarting everytime after flashing the 540mb OTA. So i did some stupid ****. First i did a factory reset from the stock recovery, the flashed the nougat firmware. Then i noticed that there was no internal drive, so i ran this code "fastboot flash partition gpt.bin" and my phone was dead after that.
So i took it to the service centre, and they told me that they're going to replace the motherboard. My only concern is the unlocked bootloader. After they replace the mobo, are they gonna see the unlocked bootloader warning?? coz if they do.. it'll be a mess :crying:
Surely the new mobo will have a locked bootloader again, and a new IMEI. It'd be like a new phone
Replacing the motherboard usually means an entirely new phone internally.
Which means it also has a different bootloader from the one you originally had. Chances are that it'll be locked and you'll have to unlock it again.
It's also a good idea from this point on to have a factory image for the stock firmware lying around in your desktop just in case an update causes a softbrick.
supacrazyguy42 said:
Surely the new mobo will have a locked bootloader again, and a new IMEI. It'd be like a new phone
Click to expand...
Click to collapse
Thank god
D13H4RD2L1V3 said:
It's also a good idea from this point on to have a factory image for the stock firmware lying around in your desktop just in case an update causes a softbrick.
Click to expand...
Click to collapse
I do. I have both MM and Nougat firmwares on my pc. This time it was a hard brick. And i'm not going to unlock my phone this time. There's no way to relock the bootloader.
Just got a call from Motorola. They told me that my phone is rooted and it won't be covered under the warranty :'( And they're asking for 80% of the price of the phone to repair it. My only option is to get the motherboard from somewhere and repair it myself. Can someone please send me a link to buy the Mobo for Moto z?

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