[Q] C6506 LTE Issues - Sony Xperia ZL

Hi all,
Wondering if anyone else has experienced a similar issue. I bought this ZL (C6506) from newegg brand new and loved the hardware. Needed to get software on par so I rushed to get CM10.1 on it. Never noticed which model it was on stock or if LTE ever worked but on CM10.1 it says it's a C6503.
I've spent all last night making sure I did this right. Unlocked bootloader and rooted using the latest Flashtool for Mac. Installed CWM and then flashed CM10.1 kernel before flashing the ROM. Still says I have a C6503 and there is no LTE to be found.
In Settings under Network Mode, the phone keeps pushing itself back to "WCDMA preffered" even after I set it to something else. I have the phone on fast.tmobile.com for the APN.
This is uber frustrating and I'd love some help getting this to be the phone of my dreams. Great form factor...now I just want the LTE speed and CM software to complete this package. Thanks all for all you do.
-Scott

Did you check on your phone box to make sure they sent you the right phone model?
Sent from my C6506 using xda app-developers app

needmoregigs said:
Did you check on your phone box to make sure they sent you the right phone model?
Sent from my C6506 using xda app-developers app
Click to expand...
Click to collapse
i checked as soon as the model number started showing "C6503" in the phone. box seems legit. newegg doesn't even sell the C6503. i may just revert everything and RMA it.

Confirm your model on the tag inside the SIM/MicroSD compartment , you need to unfold the tag though. Check out the Xperia ZL tear down video to see what i'm talking about: http://www.xperiablog.net/2013/07/08/xperia-zl-disassembly-video/ .
If in fact it's a C6506, try flashing one of the stock 4.2.2 rom: http://forum.xda-developers.com/showthread.php?t=2332539

All CM and CM based ROMs will say the model is a C6503, the builds are not made specifically for each model but the baseband is not touched.
Did you flash a baseband from another phone? Check under Phone Status what your baseband is.
You can also try using the *#*#4636#*#* secret menu, under phone information, and pick LTE only from that screen.
Are you sure T-Mobile has LTE where you are? Even if the APN is wrong, under the Phone Information menu you should see the phone attach to LTE. If it won't connect to data, change the apn to fast.t-mobile.com.

jaetelha said:
Confirm your model on the tag inside the SIM/MicroSD compartment , you need to unfold the tag though. Check out the Xperia ZL tear down video to see what i'm talking about: http://www.xperiablog.net/2013/07/08/xperia-zl-disassembly-video/ .
If in fact it's a C6506, try flashing one of the stock 4.2.2 rom: http://forum.xda-developers.com/showthread.php?t=2332539
Click to expand...
Click to collapse
tags says it's a "C6506" so that's reassuring. didn't know that was there so good to know! thanks.
havanahjoe said:
All CM and CM based ROMs will say the model is a C6503, the builds are not made specifically for each model but the baseband is not touched.
Did you flash a baseband from another phone? Check under Phone Status what your baseband is.
You can also try using the *#*#4636#*#* secret menu, under phone information, and pick LTE only from that screen.
Are you sure T-Mobile has LTE where you are? Even if the APN is wrong, under the Phone Information menu you should see the phone attach to LTE. If it won't connect to data, change the apn to fast.t-mobile.com.
Click to expand...
Click to collapse
at this point i'm not sure what i've done. baseband version says "9x15A-ACEFWMAZQ-30110041-23". i really hope this may be the root of my issue. i'm based in atlanta and i have tons of friends on tmobile picking up lte while i'm still on hspa+ or some sort of 3g in the same spot. have not seen lte at all. how would one go and reflash the radio? thanks.

sdinh07 said:
tags says it's a "C6506" so that's reassuring. didn't know that was there so good to know! thanks.
at this point i'm not sure what i've done. baseband version says "9x15A-ACEFWMAZQ-30110041-23". i really hope this may be the root of my issue. i'm based in atlanta and i have tons of friends on tmobile picking up lte while i'm still on hspa+ or some sort of 3g in the same spot. have not seen lte at all. how would one go and reflash the radio? thanks.
Click to expand...
Click to collapse
That's the same baseband version I have, so your radio is fine. Did you try doing the LTE only option?
You could also have an old SIM card, can you get LTE on another phone with your SIM card?

havanahjoe said:
That's the same baseband version I have, so your radio is fine. Did you try doing the LTE only option?
You could also have an old SIM card, can you get LTE on another phone with your SIM card?
Click to expand...
Click to collapse
that did the trick! swapped SIMs with my bud who has a galaxy s4 and it became obvious.
you guys really are the best! i'm getting ~30Mbps down almost everywhere i go thanks to this great community.:silly:

Related

Australian Galaxy nexus bad signal and drop outs

I just received the galaxy nexus and got it from optus Australia, ever since geting it 4 days ago the reception keeps dropping out and data fails to work at optimal speed as it used to in my HTC wildfire or my iPhone 4, I've flashed android revolution hd , kang, and currently using foxhound and all have updated apns. Wonder is my device just a doggy one or is everyone else in Australia getting the some problem?
Sent from my Galaxy Nexus using xda premium
technolust109 said:
optus Australia
Click to expand...
Click to collapse
Enjoy your network which is piggy banking a bajillion other smaller companies.
/thread
technolust109 said:
I just received the galaxy nexus and got it from optus Australia, ever since geting it 4 days ago the reception keeps dropping out and data fails to work at optimal speed as it used to in my HTC wildfire or my iPhone 4, I've flashed android revolution hd , kang, and currently using foxhound and all have updated apns. Wonder is my device just a doggy one or is everyone else in Australia getting the some problem?
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
Try putting a different baseband on your phone. You should be able to find your countries carrier on the forums here. Just search.
zeekiz said:
Enjoy your network which is piggy banking a bajillion other smaller companies.
/thread
Click to expand...
Click to collapse
LMAO! Rough man.
On-topic though, all good with mine on Telstra bud. Have you tried the latest APN at Ausdroid? Not sure if the Optus one has been updated recently... May also work if you try setting your radio to AUS by default, link and how-to coming shortly (I'll just find it).
haha im with telstra, brought it from optus.
do you happen to have any links to the baseband download? thanks.
I figured that as soon as I posted You should resurrect that Australian traders' thread in the MP.
- Go to the Dialer
- Dial *#*#4636#*#*, go to Phone Information
- Press MENU, "Select Radio Band" and select AUS2
- Reboot for good measure
This is supposed to optimise your radio to maximise use of the 850MHz band and stop it hopping off to 2100MHz in Metro areas.
Also use the following APN settings:
Name: Telstra Internet
APN: telstra.internet
MCC: 505
MNC: 01
Authentication: PAP or CHAP
APN type: internet
Some people recommend putting 'wap.telstra.com/wap' in the Server field. You should only use this if you need the Telstra portal, otherwise it just adds another link into the chain that isn't really necessary. TelstraOne will work just fine without it.
Let me know how you get on.
Yeh I've got same problem but after the update to 4.0.2 it got slightly better , I'm also on optus but got my phone from mobicity.
Its little annoying.
Sent from my Galaxy Nexus using xda premium
when i click the AUS2 Band and it came up with "Set [AUS2 Band] Unsuccessful is there an issue wioth my device? :S
also, i acccidently changed the network prefered type, what should it be?
hey ive got it all done, ill give you a heads up tomorrow and see how it runs for a day, because previously i was in the CBD and it was still slow as hell so ill give you a heads up if i have any problems, but the signal is on full when it was on 3 bars before
technolust109 said:
when i click the AUS2 Band and it came up with "Set [AUS2 Band] Unsuccessful is there an issue wioth my device? :S
Click to expand...
Click to collapse
Not necessarily. Perhaps flashing the DVKK6 baseband (Telstra) may help. Unsure. If it has an Optus radio they may have done something to prevent it favouring 850MHz. This is just speculation on my part dude, it works fine on my Telstra unit. Perhaps this is one of the 'optimisations' Telstra made on their model.
technolust109 said:
also, i acccidently changed the network prefered type, what should it be?
Click to expand...
Click to collapse
WCDMA.
technolust109 said:
hey ive got it all done, ill give you a heads up tomorrow and see how it runs for a day, because previously i was in the CBD and it was still slow as hell so ill give you a heads up if i have any problems, but the signal is on full when it was on 3 bars before
Click to expand...
Click to collapse
No worries man, I hope it goes a bit better for you. I'm rural and getting 3.3mbps down, 1.2mbps up which is marginally better than my Galaxy Note. Considering I'm probably on a 5.7 or 7.2mbps backend, that's pretty good. No drop-outs either.
Good luck buddy.
ive had probles flashing the DVKK6 Baseband, it came up with "cannot load (radiio name in this case the DVKK6.img) is there something wrong with it? :S
technolust109 said:
ive had probles flashing the DVKK6 Baseband, it came up with "cannot load (radiio name in this case the DVKK6.img) is there something wrong with it? :S
Click to expand...
Click to collapse
Make sure you use the trimmed .img in post 6, not the one from the OP. Unzip it first (before you try and flash it) as it contains the MD5 hash also and this will stop the process (or worse).
Use fastboot to push it to your Nexus.
alright, thanks, it worked! thanks juzz! number 1 to come to! haha, ill see how i go with reception for the week. Cheers.
Juzz!!! I flashed the new basebands but i cant send text messages!! But i can make calls whats wrong? ):
technolust109 said:
Juzz!!! I flashed the new basebands but i cant send text messages!! But i can make calls whats wrong? ):
Click to expand...
Click to collapse
You may need to change your SMSC buddy. I think it's in the menu where you change the radio to AUS2. I'll need to look up the correct number for you once I get to work. Sit tight man
EDIT: Okay. Enter the *#*#4363#*#* code, then go into phone info. Scroll to the bottom, you will see a field for SMSC. Refresh the field, and see what it contains. Mine is this:
07911614786007f0
You could try putting this in if yours is different. Let me know how you get on.
Sent from my Galaxy Note using XDA Premium
mine only shows with "00" :/
and also, it isnt letting my change to WCDMA Pref. it still shows up with GSM/CDDMA auto (PRL)
technolust109 said:
mine only shows with "00" :/
Click to expand...
Click to collapse
Change it to my number.
technolust109 said:
and also, it isnt letting my change to WCDMA Pref. it still shows up with GSM/CDDMA auto (PRL)
Click to expand...
Click to collapse
That's fine. It will only handoff to GSM where there's no 3G. As long as you're on AUS2, preferred order is 850, 2100, GSM

LTE mode on an LT28i won't enable

I have a stock/generic LT28i from Asia. Totally unlocked and all. I'm in the US off and on, so I got a post-paid AT&T plan with data. 3G works great on my HTC One X (European version, meaning no LTE). I popped the SIM in my LT28i and 3G works, but not LTE. If I try to change the network mode to LTE/WCDMA/GSM, it instantly switches back to WCDMA/GSM. If I put my 3 Sweden SIM in the phone, I can set it to LTE/WCDMA/GSM and see [LTE] AT&T in the network search list. So it seems like there's some switch in the software that's forcing LTE off for my AT&T SIM. Any idea what's going on and how I can fix it? I was having issues with my phone bootlooping so I did a full reflash of the generic 6.1.E.2.29.
Is that account setup for LTE with AT&T?
Sent from my Sony Xperia S
mroach said:
I have a stock/generic LT28i from Asia. Totally unlocked and all. I'm in the US off and on, so I got a post-paid AT&T plan with data. 3G works great on my HTC One X (European version, meaning no LTE). I popped the SIM in my LT28i and 3G works, but not LTE. If I try to change the network mode to LTE/WCDMA/GSM, it instantly switches back to WCDMA/GSM. If I put my 3 Sweden SIM in the phone, I can set it to LTE/WCDMA/GSM and see [LTE] AT&T in the network search list. So it seems like there's some switch in the software that's forcing LTE off for my AT&T SIM. Any idea what's going on and how I can fix it? I was having issues with my phone bootlooping so I did a full reflash of the generic 6.1.E.2.29.
Click to expand...
Click to collapse
You may need an AT&T 4G LTE compatible SIM card. I had the iPhone 4 with the mini sim and when I got my Xperia ion they told me I needed a new LTE SIM despite the fact that my then current SIM would have fit the in the ion (and they look the same, except my old SIM had the 3G logo on it).
Maybe you current sim is att 3G.
Same thing happened to me a few times. Kept switching to wcdma preferred. Try clearing cache, dalvik and reboot. Eventually I did get it to stick. Also when this happened to me Rogers network was having an lte outage, so that might have had something to do with it. But persistence did pay off in the end.
And yes you obviously do need an lte sim and the lte apn's for whatever network you're on.
Is your APN set correctly?
Sent from my LT28i using Tapatalk 2
Probably figured it out, and never bothered to post something to mark this thread as resolved. Now people that search and find this thread will never know the solution.
Imdking said:
Probably figured it out, and never bothered the post something to mark this thread as resolved. Now people that search and find this thread will never know the solution.
Click to expand...
Click to collapse
Ah sorry, I actually gave up and put the SIM in my One X (HSPA-only version) instead. 3G was good enough for my needs. Maybe on my next trip to America I'll put more effort into it.
having the same issue
I'm having the same issue, built I'm on net10, which is supposed to support lte speeds, but i don't get higher than 3g for their att compatible service.
Also, unable to root after phone overheated and did original gb att to gb lt28i, to ics.. the rootme or e4root neither one would work. I've got backups, but they're under titanium backup and cwm, of which neither can i access without root. Is there an .ftf firmware prerooted on ics that doesn't require anything but flashtool to install and add cwm, since I'm sure I'm not the only person with such an issue. If I've overlooked it, direct me to the page where it is, all I've found so far is stock roms, and deodexed, which i can't use.. Also, my boot loader is locked.. I've checked all threads about root and ion, and noon have been helpful with my recent issues..any downloads needed to rectify this and not the usual I've already done that loop back to the same popular pages would be helpful and appreciated. Thanks in advance.
EDIT: sorry, i didn't see how old this thread was...and to the above, i'm not sure if what it wrote applies to your network...but most likely you need to look into APN settings required by your carrier...

[FTF] Xperia ZL (C6506) 1270-4005 10.4.B.0.569 Generic North America

Here's Generic 4.3 for North America... C6506_1270-4005-10.4.B.0.569 R1C_LTE North America Commercial and Journalists.ftf
sweet, has it been tested on a C6506 ?
That's Commercial and Journalists, right? Cause Generic would be 1270-7584 (which doesn't have the update still, just checked) and this one is 1270-4005.
But, eventually, who cares. I was pretty sure we won't get update on Holidays, either before or after.
Merry Christmas!
Boosted_01 R said:
sweet, has it been tested on a C6506 ?
Click to expand...
Click to collapse
Unlocked (Sim) Bell Xperia ZL 6506 on Wind Mobile running this just fine.
Had to readd the APN, which scared the heck out of me before I realized I had to do that. Hah.
I'd post a picture but apparently I can't until I have 10 or more posts..
haekb said:
Unlocked (Sim) Bell Xperia ZL 6506 on Wind Mobile running this just fine.
Had to readd the APN, which scared the heck out of me before I realized I had to do that. Hah.
I'd post a picture but apparently I can't until I have 10 or more posts..
Click to expand...
Click to collapse
lol, yeah, learned about APN last time when I flashed generic 244 lol.... I decided to install it, so far so good. first thing I did was input the APN settings for Rogers lol... automatic download settings never seem to work for some odd reason
- Most noticeable, Camera App is much better....
- Keyboard is faster
- Phone is running hot again though..... With 4.2.2 it stopped getting hot the last month or so, ZERO Changes to the phone,maybe it will go away again, who knows... strange none the less.... maybe its a learning process with the OS...no idea lol
I flashed it & lost LTE. The APN is still the same, I'm with Rogers. Any idea what might of happened or how to fix it?
Summer Son said:
That's Commercial and Journalists, right? Cause Generic would be 1270-7584 (which doesn't have the update still, just checked) and this one is 1270-4005.
But, eventually, who cares. I was pretty sure we won't get update on Holidays, either before or after.
Merry Christmas!
Click to expand...
Click to collapse
Thats the same with the Nordic ftf.
I can not belive that
Hey guys Is this ftf actually made for the C6506? And how well is it running since flash?
Sent from my C6506 using XDA Premium 4 mobile app
DakotaBMacDonald said:
I flashed it & lost LTE. The APN is still the same, I'm with Rogers. Any idea what might of happened or how to fix it?
Click to expand...
Click to collapse
re-check your settings, I used the same settings as 4.2.2 and LTE works fine.... restart your phone if you haven't
Boosted_01 R said:
re-check your settings, I used the same settings as 4.2.2 and LTE works fine.... restart your phone if you haven't
Click to expand...
Click to collapse
Well it looks like I can get LTE occasionally, but I'm not getting any 4G HSPA+, it;s either LTE or 3G
I tried flashing just the baseband of the 4.2.2 FW but only got a bootloop.
DakotaBMacDonald said:
I tried flashing just the baseband of the 4.2.2 FW but only got a bootloop.
Click to expand...
Click to collapse
Why are you flashing the 4.2.2 baseband? This 4.3 firmware contains the AMERICAS-LTE baseband, so it has the baseband for AT&T LTE or whichever 4G operator you are on in North America.
enrique71 said:
Why are you flashing the 4.2.2 baseband? This 4.3 firmware contains the AMERICAS-LTE baseband, so it has the baseband for AT&T LTE or whichever 4G operator you are on in North America.
Click to expand...
Click to collapse
Because the 4.2.2 baseband was the last one that worked. When the 4.3 first leaked with the C6503 journalist FW, I flashed that & that's when I lost 4G but still maintained EDGE 3G & LTE. So I flash this new C6505 FW & I can still only connect with those bands. I'm with Rogers & I have all the correct APN settings, I'm so confused with what's going on, because I know this should be working & I have no idea why it isn't.
My baseband right now is 9x15A-ACEFWMAZQ-3011082-51
DakotaBMacDonald said:
Because the 4.2.2 baseband was the last one that worked. When the 4.3 first leaked with the C6503 journalist FW, I flashed that & that's when I lost 4G but still maintained EDGE 3G & LTE. So I flash this new C6505 FW & I can still only connect with those bands. I'm with Rogers & I have all the correct APN settings, I'm so confused with what's going on, because I know this should be working & I have no idea why it isn't.
My baseband right now is 9x15A-ACEFWMAZQ-3011082-51
Click to expand...
Click to collapse
The c6503 baseband was GLOBAL_HSPA, so if course it wasn't going to give you the AMERICAS LTE frequencies. The existing 4.3 c6506 firmware has the same baseband frequencies as the c6506 4.2.2 - go to the service setting and see for yourself, both say AMERICAS LTE.
Not sure why you would be seeing a difference as all c6506 releases are in fact built with the North America LTE bands.
DakotaBMacDonald said:
Well it looks like I can get LTE occasionally, but I'm not getting any 4G HSPA+, it;s either LTE or 3G
Click to expand...
Click to collapse
LTE off you wont get HSPA + on all the time, only when LTE is off and your using data HSPA + will show up.... That's how its always been for me on Rogers which is a good thing.
For what it's worth, I'm getting LTE connections on my C6506...
Sent from my C6506 using Tapatalk
Is this the same version we could expect coming out for the official launch for C6506 in North America?
jafferman said:
Is this the same version we could expect coming out for the official launch for C6506 in North America?
Click to expand...
Click to collapse
If it's not the same, it's very close...
Sent from my C6506 using Tapatalk
well....
OK so the truth is that, I really like interactions and interface of the new 4.3 on the ZL but its seems to have much bugs than 4.2.2 versiĆ³n 244, the phone freezes some times when browsing the web with chrome, and the camera quality is not sooo good. I like how smooth it is, but my phone freezes 2 times and I had to press the yellow one......battery performance seems to be much better when using stamina, but Im back to 4.2 MUCH MUCH stable, no bugs for me, no freezes, and camera prformance seems to be much better. I think il w8 for the 4.4
scifan said:
If it's not the same, it's very close...
Sent from my C6506 using Tapatalk
Click to expand...
Click to collapse
The baseband will be 100% the same and there may be one or two APKs that differ, mainly store / retail demos.

Lte on m919v 4.4.2

OK i have tried to find the answer to this question i have a S4 M919V ( Videotron/Wind) on 4.4.2 (M919VVLUFNB5) And I'm currently with virgin mobile (Bell) i have evething set up to receive LTE on the phone. the sim card is LTE ready but i have no way of getting the phone to receive it.
I've tried to go into setting ( phone dial *#2263#) of that but nothing worked.
I don't mind rooting my phone but would love to get LTE without having to sell my phone and buying another one
humonculi said:
OK i have tried to find the answer to this question i have a S4 M919V ( Videotron/Wind) on 4.4.2 (M919VVLUFNB5) And I'm currently with virgin mobile (Bell) i have evething set up to receive LTE on the phone. the sim card is LTE ready but i have no way of getting the phone to receive it.
I've tried to go into setting ( phone dial *#2263#) of that but nothing worked.
I don't mind rooting my phone but would love to get LTE without having to sell my phone and buying another one
Click to expand...
Click to collapse
have you tried the settings here?
Settings/More networks/mobile networks
Your Network mode should show LTE,WCDMA (auto connect)
if not, tap on the network mode and select the LTE/WCDMA (auto connect) option and back all the way out.
Turn on airplane mode for about 30 seconds and then turn it back off and see what your results are.
You need to be SURE that LTE reception is possible where you are trying this. After all, no matter how good your hearing is, you won't hear me talking if you're out of earshot, right? LOL
Good luck!
Yeah I've tried it and for some reason I don't have this option but your right about checking if the lte is available before doing anything
humonculi said:
Yeah I've tried it and for some reason I don't have this option but your right about checking if the lte is available before doing anything
Click to expand...
Click to collapse
Do you have any S5 apps installed?
If using a build prop mod you can lose your LTE settings in "networks".
Pp.
sent from my bluetooth controlled toaster that also takes pictures.
I have an unrooted galaxy s4 running on stock 4.4.2
humonculi said:
I have an unrooted galaxy s4 running on stock 4.4.2
Click to expand...
Click to collapse
Thats strange, this issue has been encountered with rooted phones running stock/custom roms while running some mods.
You may have to do a factory reset, or stop by a TMOBILE store and let them check it out.
Pp.
sent from my bluetooth controlled toaster that also takes pictures.
humonculi said:
OK i have tried to find the answer to this question i have a S4 M919V ( Videotron/Wind) on 4.4.2 (M919VVLUFNB5) And I'm currently with virgin mobile (Bell) i have evething set up to receive LTE on the phone. the sim card is LTE ready but i have no way of getting the phone to receive it.
I've tried to go into setting ( phone dial *#2263#) of that but nothing worked.
I don't mind rooting my phone but would love to get LTE without having to sell my phone and buying another one
Click to expand...
Click to collapse
Does that phone even support LTE?
PanchoPlanet said:
Thats strange, this issue has been encountered with rooted phones running stock/custom roms while running some mods.
You may have to do a factory reset, or stop by a TMOBILE store and let them check it out.
Pp.
sent from my bluetooth controlled toaster that also takes pictures.
Click to expand...
Click to collapse
They don't have T-Mobile, and its not a T-Mobile device
Sent from my SGH-M919 using Tapatalk
On 4.2, my friend, with the exact same phone was able to force lte. But cutting any phone line
humonculi said:
On 4.2, my friend, with the exact same phone was able to force lte. But cutting any phone line
Click to expand...
Click to collapse
Were they on the same network as you?
Sent from my SGH-M919 using Tapatalk
I don't know to be honest.
I got a legit lte sim car from virgin mobile because they offer lte and i've read that the t-mobile phone (m919) supports bell 's LTE frequencies
humonculi said:
I don't know to be honest.
I got a legit lte sim car from virgin mobile because the offer lte
Click to expand...
Click to collapse
Could be that it doesn't support LTE from your carrier.. I think it may be capable to support LTE but its disabled on that model.. I've seen people flash M919 modems and gotten LTE to work. Just make sure you do some research, and more research if you device to do this
Sent from my SGH-M919 using Tapatalk
I've been rooting my phone as if it was a normal t-mobile m919 but I tried searching for into to see it there was a way to simply make my V (m919V) disappear and solve all my problems but nothing yet I know you can but as far as warranty, brick and risks go I have not found much information regarding this issue and that why I started this post
I wanted to say thank you to everyone for your help and suggestions
OK I've done some research and it seem that the m919v has the lte hardware to run the frequency 700
( http://www.morecellphone.com/compar...vs-samsung-galaxy-s4-lte-gt-i9505-64gb/340724)
And that virgin mobile (bell's network)
(bell is one of the biggest telecommunications companies in canada)
has this frequency on their network
(http://en.m.wikipedia.org/wiki/List_of_LTE_networks)
The only thing is that the lte frequency off 700 was lunched in Ontario last month and I'm in Montreal
But the fact that t-mobile only has 1700 and that virgin uses this here means that the phone isn't the problem and with this information, i've concluded that it a software issue
serio22 said:
Were they on the same network as you?
Sent from my SGH-M919 using Tapatalk
Click to expand...
Click to collapse
So the question would be is There a way I can flash radio (baseband) without having everything getting messed up
And will i lose my data.
ive done a nandroid backup just in case. The phone is also rooted used T-Mobile files

[Q] HELP!!! ATT Galaxy S3 I747 unestable network or band conection

I have a ATT sgh-i747 4.4.2 KitKat unlocked and I use for Carrier Claro PR the connection to 4G lost in a few minutes from start up I can not do a call or use internet only wifi, I put apn from Claro PR LTE but nothing, I go to ServiceMode and in band selection are in Automatic I change to GSM all and works but in edge network for internet too slow but I can do any call, then I change to WCDMA all but not work I use WCDMA 850mhz only this works 4G, I use LTE all but only internet connection, what I can do to have all connection works including LTE. Thanks, if someone can help me will be apreciate.
Did it ever work properly on that carrier. If so, when did this start, and did you do anything to the device (flashing, modding, etc) just before it started?
DocHoliday77 said:
Did it ever work properly on that carrier. If so, when did this start, and did you do anything to the device (flashing, modding, etc) just before it started?
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HI Doc thanks for respond, I bought this phone used and phone have version 4.3 with PhilipTouch Recovery but system not have root or SuperSU then I flash stock recovery to use the update.cfg rename it to.zip and now are 4.4.2 stock rom official but in 4.3 same issue with network, I copy from my fathers phone att s3 NVfiles with QPST and I flashed to mine and put again my imei but nothing, what do you really think what happened in you're experience?
Im not really sure, but since you bought it used you should check to make sure the imei isnt blacklisted.
Does your fathers S3 work on the same network? Try swapping SIM cards. Test your card in his device and your device with his card.
DocHoliday77 said:
Im not really sure, but since you bought it used you should check to make sure the imei isnt blacklisted.
Does your fathers S3 work on the same network? Try swapping SIM cards. Test your card in his device and your device with his card.
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My fathers phone is from ATT network, but I put my imei from my broken phone Galaxy s3 and is not black listed and is from Claro PR Network but let me see if my father give me again his phone because he don't want any body touch it and i dont know if is unlocked, I had to beg, and it was a miracle that gave me the phone to extract from his phone the nvfiles last time, you know if I can try something else DocHoliday??? Thanks.:good:
If you changed the original IMEI that's exactly why you are experiencing problems.
Anything but the original one assigned to the device will most likely cause problems. Even if its from another device that's the same model.
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