Develop Bugs

3G not working. Please Help.

Hello everybody,
I have a carrier unlocked Xperia Arc. I had flashed .58 firmware, which I had rooted with Zegrush method (bootloader is locked). It was working fine for a few days, then suddenly the 3G stopped working. I am still getting the EDGE (2G) data transfer.
Since my SIM when inserted into my friends Samsung i9003 was giving a good 3G connection and also my friends SIM when inserted into my Xperia Arc was unable to connect through 3G, I thought that the fault was in my Xperia Arc only.
I have
1) Checked APN settings, they are fine. Downloaded and installed them again to be doubly sure.
2) Did a soft reset
3) Did a hard reset
4) Used repair through PC companion
5) flashed .62 firmware with accompanying baseband
6) flashed .42 firmware with accompanying baseband
7) checked network mode. Its WCDMA(preferred)/GSM. On switching to WCDMA, the 3G connection works for a few minutes and then the whole connection drops.
8) I read in some discussion boards that a similar problem arises if the SIM card lock is used but I am not using it.
Is it a hardware defect? Should I unlock the bootloader and flash one of the custom ROMS?
Any other suggestions?
Please help.
Thanking in advance.

call your network provider and say your problem, if they cant solve your problem or says everything is ok then contact sony ericsson repair center.

[Q] Xperia Play R800i No Service

Hello, i have an xperia play which is R800i, it's bootloader unlocked, and should be network unlocked, if i go in that option with brackets like [] Network etc they are all with empty brackets and 0, according to some pages its fully unlocked, but still, i cannot get it to work, i've made several baseband changes, roms, etc,
what could be the problem of the phone? i bought it from someone that i usually buy stuff off, so i "shuld" be sure its not imei locked, but then, even if it was imei locked, would i be able to set a PINfor the SIM card? is there a way to check if there's a SIM card inserted in the phone from android? because i feel like it doesn't read my sim at all.
Please suggestions are welcome i tried everything, thank you

i can pay for a solution if its 100% working

hi
KActat1992 said:
Hello, i have an xperia play which is R800i, it's bootloader unlocked, and should be network unlocked, if i go in that option with brackets like [] Network etc they are all with empty brackets and 0, according to some pages its fully unlocked, but still, i cannot get it to work, i've made several baseband changes, roms, etc,
what could be the problem of the phone? i bought it from someone that i usually buy stuff off, so i "shuld" be sure its not imei locked, but then, even if it was imei locked, would i be able to set a PINfor the SIM card? is there a way to check if there's a SIM card inserted in the phone from android? because i feel like it doesn't read my sim at all.
Please suggestions are welcome i tried everything, thank you
Click to expand...
Click to collapse
i can try to fix it ..... contact me on gtalk [email protected]

kks111 said:
i can try to fix it ..... contact me on gtalk [email protected]
Click to expand...
Click to collapse
He couldn't fix it because he said its after some week date etc, but really is there nothing to try?
Also what may be the reason after i flash a kernel it stays black screen? could kernel help resolve sim issues?

hi,replying cause i have same problem..i unlocked the bootloader with sony offcial method the second i had it in my hands and flashed a custom rom(everything working fine before the flashing..)..oddly i could use data(browser youtube facebook ecc working) but no calls or text..so i relocked bootloader and flashed with seus but nothing to do,same problem data working but no calls or text..then i unlocked again tried some roms,then decided to relock and give a try again with seus..now it won't recognise the sim at all,and NO FASTBOOT,it was working fine before the 2nd flash with seus,and i know for sure it's not an hardware issue...flashed many simlock.ta(changing the name to preset.ta) with flashtools..bot nothing.now i can only flash stock tft,since fastboot is no longer working(so i can't unlock the bootloader for the 3rd time), everytime after first boot it ask to insert sim and reboot, even if it ask for pin if i set it..so it IS reading the sim...the radio is bricked,been searching for 2 weeks now, and no solution found. i contacted alejandrissimo, he said he coul fix broken trim area for 20$, but it isn't answering to my messages anymore..sorry bro it looks like our play it's gone forever as a phone, so far..

plese help.....
my xplay not working edge network but 3g working good....
many much frmwre i try...but not sucses....
im using xperia play r800i gb 2.3.4

I have the same issue in xperia play R800i too, network 2g not working anymore I tried several sim cards, not worked , my bootloader unlocked as my battery is drain in 5 hours too even I tried everything rooms kernels basebands , apps closing google play service all solutions in the net,with no hope :s , hardware problem ? it' snot because i heard someone found some new formation that it's an problem in baseband and it's happened to his Sk18i and Sony fixed it by ICS update , it's has the same problem no 2g and battery drain in 12 hours and after he updated the battery fixed it's goes for 48 ours with normal use and the 2g worked , and the problem is there is no official Ics update in our device
any one can help ?? or find solution ,, I'm sure that there are many many people who are suffering with this horrible problem

xkiasfansuryx said:
plese help.....
my xplay not working edge network but 3g working good....
many much frmwre i try...but not sucses....
im using xperia play r800i gb 2.3.4
Click to expand...
Click to collapse
Check your APNs, from my experience they get reset if you flash a generic FTF
---------- Post added at 10:09 AM ---------- Previous post was at 10:07 AM ----------
inaroom said:
hi,replying cause i have same problem..i unlocked the bootloader with sony offcial method the second i had it in my hands and flashed a custom rom(everything working fine before the flashing..)..oddly i could use data(browser youtube facebook ecc working) but no calls or text..so i relocked bootloader and flashed with seus but nothing to do,same problem data working but no calls or text..then i unlocked again tried some roms,then decided to relock and give a try again with seus..now it won't recognise the sim at all,and NO FASTBOOT,it was working fine before the 2nd flash with seus,and i know for sure it's not an hardware issue...flashed many simlock.ta(changing the name to preset.ta) with flashtools..bot nothing.now i can only flash stock tft,since fastboot is no longer working(so i can't unlock the bootloader for the 3rd time), everytime after first boot it ask to insert sim and reboot, even if it ask for pin if i set it..so it IS reading the sim...the radio is bricked,been searching for 2 weeks now, and no solution found. i contacted alejandrissimo, he said he coul fix broken trim area for 20$, but it isn't answering to my messages anymore..sorry bro it looks like our play it's gone forever as a phone, so far..
Click to expand...
Click to collapse
I'm 100% sure having a locked boot loader makes accessing fast boot impossible? If you can still flash FTF find one for an ICS Rom and see if that fixes it

SubjectSigma said:
Check your APNs, from my experience they get reset if you flash a generic FTF
---------- Post added at 10:09 AM ---------- Previous post was at 10:07 AM ----------
I'm 100% sure having a locked boot loader makes accessing fast boot impossible? If you can still flash FTF find one for an ICS Rom and see if that fixes it
Click to expand...
Click to collapse
thanks for replying, i reflashed with wotan and now i have unlocked bootloader, and can flash but the problem on 3g stiil exist. i'm on superjellybean8, and sometimes it will lose the signal on 3g(but data fully working) i get emergency call only,i can browse and other data task like facebook etc, but no call or text, so i turn airplane mode on off until it gets the signal(wich sometimes is very very painful and slow..). i usually get no problem on 2g..so may i start thinking it could be hardware problem on the 3g antenna or something? i've been using it for a couple month now,if i could get rid of the 3g problem it would be great..it makes me miss some important calls you know..

inaroom said:
thanks for replying, i reflashed with wotan and now i have unlocked bootloader, and can flash but the problem on 3g stiil exist. i'm on superjellybean8, and sometimes it will lose the signal on 3g(but data fully working) i get emergency call only,i can browse and other data task like facebook etc, but no call or text, so i turn airplane mode on off until it gets the signal(wich sometimes is very very painful and slow..). i usually get no problem on 2g..so may i start thinking it could be hardware problem on the 3g antenna or something? i've been using it for a couple month now,if i could get rid of the 3g problem it would be great..it makes me miss some important calls you know..
Click to expand...
Click to collapse
I'm pretty sure the GSM attenna is on the top left on the opposite of side of the power button, have you dropped it recently?
Just occurred to me now, call your service provider and see if the 3G tower in your area is undergoing maintenance

SubjectSigma said:
I'm pretty sure the GSM attenna is on the top left on the opposite of side of the power button, have you dropped it recently?
Just occurred to me now, call your service provider and see if the 3G tower in your area is undergoing maintenance
Click to expand...
Click to collapse
that's what happens.. it get the net but then give the emergency calls only message..

inaroom said:
that's what happens.. it get the net but then give the emergency calls only message..
Click to expand...
Click to collapse
I wouldn't post your IMEI on the internet

SubjectSigma said:
I wouldn't post your IMEI on the internet
Click to expand...
Click to collapse
thanks for the advice didn't think about it..

inaroom said:
that's what happens.. it get the net but then give the emergency calls only message..
Click to expand...
Click to collapse
no one knows?

Won't you mind if I join this thread?
I've got r800i unlocked from aliexpress which was working fine but had non-working touch-sticks.
So I tried to flash newer firmware (.79) and end up with 'no service' problem.
Like OP I have "[] Network 0" so it's definitley not become locked but it doesn't see my provider.
The funny thing is that it does see one of the local providers but only one of three.
Tried different ftf's, currently on R800i_4.0.2.A.0.84_Vodafone DE_(1247-8566).
The only thing I know from the original firmware (from flashtool) is:
Current device : R800i - CB5A1D6HYX - 1247-6268_R8D - 1245-8821_4.0.2.A.0.42 - WORLD-1-8_4.0.2.A.0.42
As I understand this one had Meteor IE baseband.
Is this problem has something with firmware or could it be antenna/hardware problem?

gvma said:
Won't you mind if I join this thread?
I've got r800i unlocked from aliexpress which was working fine but had non-working touch-sticks.
So I tried to flash newer firmware (.79) and end up with 'no service' problem.
Like OP I have "[] Network 0" so it's definitley not become locked but it doesn't see my provider.
The funny thing is that it does see one of the local providers but only one of three.
Tried different ftf's, currently on R800i_4.0.2.A.0.84_Vodafone DE_(1247-8566).
The only thing I know from the original firmware (from flashtool) is:
Current device : R800i - CB5A1D6HYX - 1247-6268_R8D - 1245-8821_4.0.2.A.0.42 - WORLD-1-8_4.0.2.A.0.42
As I understand this one had Meteor IE baseband.
Is this problem has something with firmware or could it be antenna/hardware problem?
Click to expand...
Click to collapse
I had problem with "no service" after flash FTF, so the idea its baseband related, I try flash another one, and with R800i_-80_Baseband_GSM.ftf I have success, i have carrier again. maybe help someone

mikrom.cz said:
I had problem with "no service" after flash FTF, so the idea its baseband related, I try flash another one, and with R800i_-80_Baseband_GSM.ftf I have success, i have carrier again. maybe help someone
Click to expand...
Click to collapse
Thanks bro, but I sent the faulty device back to China. That's was the first idea - to change basebands, but that didn't help either in my case.

[Q] Seriously guys i want your help. please....!! Airplane mode problem

Yesterday i install a custom Rom 4.2.2 after kitkat cyanogenmod BR2. before installation i put my phone on airplane mode.
after installation my HD is showing signal bars (white colored) and on top no service and cross sign.
other sim networks works perfectly only Telenor network has this problem.
i have tried changing radio version. now i am on latest one.
i have tried full wipe and install again kitkat and jellybean no success.
please guys help me what should i do.
thanks (sorry for bad English)

Z4Zeeshan said:
other sim networks works perfectly only Telenor network has this problem.
Click to expand...
Click to collapse
So, other SIMs are working with different radio versions? I think that your phone is fine.
Z4Zeeshan said:
i have tried changing radio version. now i am on latest one.
i have tried full wipe and install again kitkat and jellybean no success.
Click to expand...
Click to collapse
Might be a trouble from operator side. Check Telenor SIM on other phone.
If it will work - flash factory ship ROM on yor DHD and flash original radion version.
It's strange mystical part, but stock ROM resolves a lot of troubles

No success
coloured_chalk said:
So, other SIMs are working with different radio versions? I think that your phone is fine.
Might be a trouble from operator side. Check Telenor SIM on other phone.
If it will work - flash factory ship ROM on yor DHD and flash original radion version.
It's strange mystical part, but stock ROM resolves a lot of troubles
Click to expand...
Click to collapse
Thanks for reply other sims works fine with ever version of radio only that telenor sim doesn't work as before flashing a new rom i put my DHD in airplane mode i think that is the main problem...
if i do same process with other sim ( before flashing other rom put DHD in airplane mode ) then that sim network will not work also..those sims will work fine in other cellphone.
like i use the same process( before flashing other rom put DHD in airplane mode ) with Mobilink sim it shows signals but when i call or sms it says Mobile network not available (in screenshot)
and when i use Telenor it says no service (in screenshot)
when i try to choose a mobile network manually in settings it says "your sim doesn't allow a connection to this network" (in screenshot).
and when i try to choose a mobile network automatically in settings it says "Can't connect to this network right now try again latter" (in screenshot).
other sims works fine
all screenshots are attached with other information
please help me.please :crying:
update : also tried latest RUU same problem again

Z4Zeeshan said:
Thanks for reply other sims works fine with ever version of radio only that telenor sim doesn't work as before flashing a new rom i put my DHD in airplane mode i think that is the main problem...
if i do same process with other sim ( before flashing other rom put DHD in airplane mode ) then that sim network will not work also..those sims will work fine in other cellphone.
like i use the same process( before flashing other rom put DHD in airplane mode ) with Mobilink sim it shows signals but when i call or sms it says Mobile network not available (in screenshot)
and when i use Telenor it says no service (in screenshot)
when i try to choose a mobile network manually in settings it says "your sim doesn't allow a connection to this network" (in screenshot).
and when i try to choose a mobile network automatically in settings it says "Can't connect to this network right now try again latter" (in screenshot).
other sims works fine
all screenshots are attached with other information
please help me.please :crying:
update : also tried latest RUU same problem again
Click to expand...
Click to collapse
This Is strange... Is your device made in china or taiwan?
Reason for asking this question is that, taiwanese made DHD normally generate certain problems out of the bloom that usually makes no sense.
From my understanding, When you flash a rom, you format the data partition and this partition holds every change you made to the os during the time of use. So there isnt any reason why a mode you left your phone in before flashing another rom should have such an effect.
Have you tried inserting another sim from the same mobile operator?
Edit:: And what rom is that? It looks nice. Can you give me a link to it?

mickeyasamoah said:
This Is strange... Is your device made in china or taiwan?
Reason for asking this question is that, taiwanese made DHD normally generate certain problems out of the bloom that usually makes no sense.
From my understanding, When you flash a rom, you format the data partition and this partition holds every change you made to the os during the time of use. So there isnt any reason why a mode you left your phone in before flashing another rom should have such an effect.
Have you tried inserting another sim from the same mobile operator?
Edit:: And what rom is that? It looks nice. Can you give me a link to it?
Click to expand...
Click to collapse
its not chinese version.. i know it is so strange can you tell me it looks like sim locked ?? if that happened may can be unlocked. and Rom is
http://forum.xda-developers.com/showthread.php?t=2533007

Z4Zeeshan said:
its not chinese version.. i know it is so strange can you tell me it looks like sim locked ?? if that happened may can be unlocked. and Rom is
http://forum.xda-developers.com/showthread.php?t=2533007
Click to expand...
Click to collapse
It cant be a simlock. It takes more than airplane mode to throw a device in sim lock.
And if it was sim lock, it would only accept one particular sim card and not accept some simcards and reject others.
These made in taiwan Desire HDs develop problems that dont mount up to any proper explanation, as i already said.
Like mine, its taiwanese made and when i take out the simcard, it runs smoothly, but as soon as i insert a simcard, the device becomes laggy/slow. i have tried so many things but they all dont seem to work. This isnt the only problem, there are others.
This only leaves me with the conclusion that, the taiwan made DHDs are immetations/fake.

mickeyasamoah said:
It cant be a simlock. It takes more than airplane mode to throw a device in sim lock.
And if it was sim lock, it would only accept one particular sim card and not accept some simcards and reject others.
These made in taiwan Desire HDs develop problems that dont mount up to any proper explanation, as i already said.
Like mine, its taiwanese made and when i take out the simcard, it runs smoothly, but as soon as i insert a simcard, the device becomes laggy/slow. i have tried so many things but they all dont seem to work. This isnt the only problem, there are others.
This only leaves me with the conclusion that, the taiwan made DHDs are immetations/fake.
Click to expand...
Click to collapse
thanks buddy my imei number is changed thats why this happend plz tell me how to use QPST ? any link ??

Z4Zeeshan said:
thanks buddy my imei number is changed thats why this happend plz tell me how to use QPST ? any link ??
Click to expand...
Click to collapse
Pls Lets Use The Other Thread.

Problem with 2G network.

Hello everybody! I have a problem. When I am in 2G network, network signal is good, but no one can call me. SMS is incoming and internet works. But no calls. Sometimes and me can't even be able to call. What is the problem? With 3G network no problem.
Device - T999N.
I live in Uzbekistan. Operator is Beeline Uzbekistan.

Is the phone running the latest bootloader and modem? Which ROM is installed?

Modem T999NUVUBOH1.
Now installed RR от d2att. But I've try CyanogenMod, LiteRom, OctOs. And STOCK that was, I do not remember.
And what do you mean with the bootloader?

The bootloader is what allows the phone to boot the ROM. It's similar to a computer BIOS.
This happens on the stock ROM too?

audit13 said:
The bootloader is what allows the phone to boot the ROM. It's similar to a computer BIOS.
Click to expand...
Click to collapse
I now about Bios. Bootloader is kernel in custom roms?
audit13 said:
This happens on the stock ROM too?
Click to expand...
Click to collapse
I don't remember. Bought and immediately flashed custom.

Bootloader is not the kernel. The Kernel is part of the operating system.

Well, now I'll try to change the bootloader. Can you give the actual link?
And it will not break unlock?

The simplest way to update everything on the phone would be to flash a stock ROM from sammobile.com. Flashing a stock ROM should not re-lock the phone to a carrier. I have used several Samsung phones in the past and, once the phone has been network unlocked, it has stayed unlocked.
Before flashing anything, confirm the phone's model # in download mode.

audit13 said:
The simplest way to update everything on the phone would be to flash a stock ROM from sammobile.com. Flashing a stock ROM should not re-lock the phone to a carrier. I have used several Samsung phones in the past and, once the phone has been network unlocked, it has stayed unlocked.
Before flashing anything, confirm the phone's model # in download mode.
Click to expand...
Click to collapse
I flashed T999NUVUBOH1_T999NTMBBOH1_TMB from Sammobile. But Phone is bootlooped. It shows only logo MetroPCS Wireless for all and notification LED lights.

Phone is booted. But in stock also I can't call in the EDGE network.

Does the carrier have 2g for voice calls? I know that 2g is being eliminated in the USA.

audit13 said:
Does the carrier have 2g for voice calls? I know that 2g is being eliminated in the USA.
Click to expand...
Click to collapse
Oh sure. Half of the our country works in 2G.

Hmm, I'm not sure why 2g calls don't work as the s3 definitely supports 2g.

Cannot connect to LTE (doesn't matter what rom i'm on)

Hi XDA, I have an unlocked pixel XL on verizon network. I cannot connect to LTE or anything other than 2g networks. I have clean installed, changed APNs and tried everything to properly get the LTE back. Help?

kingbri said:
Hi XDA, I have an unlocked pixel XL on verizon network. I cannot connect to LTE or anything other than 2g networks. I have clean installed, changed APNs and tried everything to properly get the LTE back. Help?
Click to expand...
Click to collapse
I mean this is gonna sound dumb but have you looked at the mobile networks setting page and have your preferred network on LTE?

loeffler23 said:
I mean this is gonna sound dumb but have you looked at the mobile networks setting page and have your preferred network on LTE?
Click to expand...
Click to collapse
Yes

Can you change the network operators on 8.1?

Is your unlocked Pixel XL from the USA? It seems it doesn't support the correct bands for your network

All pixels have the same radios. Dial *#*#4636#*#* click on phone info. Change settings if needed

SIM card is toast. I have had this exact thing happen to me. Just go into a VZW store and request a new one. Sim handshake needed for LTE connection only on VZW.

SynisterWolf said:
SIM card is toast. I have had this exact thing happen to me. Just go into a VZW store and request a new one. Sim handshake needed for LTE connection only on VZW.
Click to expand...
Click to collapse
I did get a new sim card, problem still persists

kingbri said:
I did get a new sim card, problem still persists
Click to expand...
Click to collapse
After you got the new sim and installed it did you go back to factory rom and waited a bit for it to connect to the network?
Sent from a Glade[emoji768] PlugIns[emoji768]

SynisterWolf said:
After you got the new sim and installed it did you go back to factory room and waited a bit for it to connect to the network?
Sent from a Glade[emoji768] PlugIns[emoji768]
Click to expand...
Click to collapse
I put the sim in when I reset, no connection, should I try again?

kingbri said:
I put the sim in when I reset, no connection, should I try again?
Click to expand...
Click to collapse
What firmware version are you on? And when you update are you flashing all or just flashing a certain thing?

loeffler23 said:
What firmware version are you on? And when you update are you flashing all or just flashing a certain thing?
Click to expand...
Click to collapse
I'm on the February patch, stock. I'm flashing everything, also, is it normal for your phone number to not be your phone number with a new sim?

My number showing up on about phone is 908-770-6054. This is not my number, could it be human error?

kingbri said:
My number showing up on about phone is 908-770-6054. This is not my number, could it be human error?
Click to expand...
Click to collapse
Contact your carrier or go in and tell them that it is not your number and that you are stuck on 2g they should be able to tell you how to fix it or if you go in they can fix it

I did contact my carrier, they cannot figure out what to do. Replaced the sim about 4 times, still no luck. I go into testing (secret code) and I am on 1x network @loeffler23

Sounds like your efs data could be corrupt and there is no way to fix that. Or your LTE radio is toast. Did someone try to carrier unlock your phone?

DR3W5K1 said:
Sounds like your efs data could be corrupt and there is no way to fix that. Or your LTE radio is toast. Did someone try to carrier unlock your phone?
Click to expand...
Click to collapse
my phone's unlocked by default and there has to be a way to fix efs, not accessible by recovery? (what is efs)

It holds the imei and other radio proprietary info not sure what partition that data is actually in on this device. I think the efs data is no longer in /efs
Twrp used to have a option for efs backup with the data system backup and restore options