[Q] New Z1 C6903 - No data at all on AT&T - Xperia Z Q&A, Help & Troubleshooting

I just received my Z1 and had AT&T provide a new SIM for use in it. Cellular works perfectly and I can send/receive texts but the handset will not do any data transmission at all. I understand the likelihood of getting LTE is slim but it's not picking up the other networks either.
Are there any things I should try? I've played around with different APNs to no avail already.
TIA.

Wrong forum.
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[Q] C6603 not having 4g option (UK)

Hi,
Hoping someone can shed some light on this odd problem I have. I'm on EE in the UK which is at moment our only 4g provider. I smashed my old S3 LTE screen so my girlfriend (Who is on 02) upgraded early to an xperia z, which we were assured is 4g compatible. We had to unlock the phone to work on my network of course.
However, after unlocking I don't have the option to change to 4G in the network menu.
I've checked the following:
The phone is the C6603 model, which I double checked supported the bands and frequencies used by EE
I receive 4g in my area (Used to with old phone)
I checked with 02 that the phone was 4G compatible
However I'm guessing it's been turned off in the software that 03 loaded to customize the phone. I can't for the life of me find any info on the internet on how this is done or reversed, and I'm a little hesitant to flash the ROM as I would be murdered should I brick the thing.
Any ideas? Anything appreciated.
I flashed the Spanish 4.2.2 ftf file onto my UK 3 Z.
That gives me the option to use LTE networks. You might have to do something similar to get yours to pick up a LTE signal.
Did you say the phone was from O2?
Its also a piece of piss to flash ftf files. You don't even have to root or unlock the bootloader.
Sent from my Nexus 7 using xda app-developers app
warface said:
I flashed the Spanish 4.2.2 ftf file onto my UK 3 Z.
That gives me the option to use LTE networks. You might have to do something similar to get yours to pick up a LTE signal.
Did you say the phone was from O2?
Its also a piece of piss to flash ftf files. You don't even have to root or unlock the bootloader.
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
Yeah, phone was got from 02. I suspected that there's something loaded with the bloatware... Hm, so I guess I need to try flashing and risking the wrath of the girlfriend should it go up the swanny..
Dial *#*#4636#*#* and in phone information there is an option to change to lte,try it.
Sent from my C6603 using xda premium
gm007 said:
Dial *#*#4636#*#* and in phone information there is an option to change to lte,try it.
Sent from my C6603 using xda premium
Click to expand...
Click to collapse
Now this is odd, I had the option when I went in there... But it flicks straight back to WCMDA Preferred. I also just rooted it.. so I'm confused now.
So better to do what warface suggest.
Sent from my C6603 using xda premium

[Q] How do I get Tmobile 3G connection on Family Mobile?

Hey Guys,
I just got a new Xperia SP (C503) that is factory unlocked. I am currently using it on Walmart Family mobile (T-Mobile) plan but I can only get Edge data connection speeds. Is there a way to get 3G on this phone on the Family Mobile network.
Have you tried adjusting the network settings found in settings/more/network mode then set it to wcdma preferred(gsm)
Once changed a reboot will be needed.
If you have done this then maybe somebody else can help
Sent from my C5303 using xda premium
zolaisugly said:
Have you tried adjusting the network settings found in settings/more/network mode then set it to wcdma preferred(gsm)
Once changed a reboot will be needed.
If you have done this then maybe somebody else can help
Sent from my C5303 using xda premium
Click to expand...
Click to collapse
That is the setting I have it on. I am wondering if it has something to do with the APN settings. I have called the Family Mobile support but they weren't helpful. Can someone help? Anyone?
To get the APN look under xperia in settings for get internet and MMS settings sent to phone.
Again if you have done this I really don't know....I am assuming your area is/has 3g coverage/ready
Sent from my C5303 using xda premium
brown14you said:
Hey Guys,
I just got a new Xperia SP (C503) that is factory unlocked. I am currently using it on Walmart Family mobile (T-Mobile) plan but I can only get Edge data connection speeds. Is there a way to get 3G on this phone on the Family Mobile network.
Click to expand...
Click to collapse
C5303 isn't compatible with T-Mobile for 3G or LTE. You could get 3G on AT&T, or if you want to stick with Family Mobile you would need the C5302 to get 3G.
Have a look at gsmnation.com to check compatibility.
Falzo said:
C5303 isn't compatible with T-Mobile for 3G or LTE. You could get 3G on AT&T, or if you want to stick with Family Mobile you would need the C5302 to get 3G.
Have a look at gsmnation.com to check compatibility.
Click to expand...
Click to collapse
Thanks for the update. I will probably look for another phone.

Why no 3G or LTE while in a phone call?

If I remember correctly I could use Data while on the phone on my M7, why am I not able to on the M8? Running ViperRom and have full LTE service but can't talk and use data at the same time...
The same is happening in S5....
Sent from my SM-G900F using XDA Premium 4 mobile app
Moved to Q&A
This thread will get you started http://forum.xda-developers.com/showthread.php?t=2698826
It's no fault of the phone, Rom or anything like that.
Sent from M8 on XDA Premium APP
There are threads about this here already. A search should yield results.
The bottom line is that this is not currently possible on the Tri-Band LTE devices on Sprint's network.

Z1s taking time to switch from wifi to LTE

Any one having issues with a long delay between getting off a wifi network and jumping on to the cellular network. Calls work fine is just the days portion that takes awhile.
Sent from my C6916 using XDA Free mobile app
Yes happens to me all the time. Heard anything as to why this is & how to fix?
Sent from my C6916 using XDA Free mobile app
So far opening and doing a refresh in the slick deals app has been consistent. But other than that nothing. it's almost like it needs something to tell it hey I need Internet now.
Tried disabling mobile data which works occasionally also. Airplane mode is about the same consistency.
Sent from my C6916 using XDA Free mobile app
Yeah toggling airplane on/off is the only workaround I have. Thanks!
Sent from my C6916 using XDA Free mobile app
Same problem here
I've been having the same problem since my Xperia Z3 Compact received the Over-the-Air update to Lollipop. I have T-Mobile too, and they had me re-enter the APN settings, to no avail. The problem persists. I will not do a Repair because I don't want a factory reset (for various obvious reasons). Plus, reading this thread tells me that a Repair won't fix the problem. Even through the two of us both have T-Mobile, I think this is a coincidence and this problem has nothing to do with the carrier. This is purely a bug in the Sony edition of the Lollipop O/S.

motox keeps losing data connection

Hi guys, for the past week and a half my phone is losing data connection. In places I consistently get LTE the signal drops to H+ and I have no data connection, then after a few mins I get LTE back. This happens sporadically.
I've rebooted the phone, removed and reinstalled the SIM and contacted my carrier (ROGERS) they rebooted the system from their end but the problem persists.
Anybody else experiencing this issue and if so did you solve it?
Sent from my XT1058 using XDA Free mobile app
Jamolah said:
Hi guys, for the past week and a half my phone is losing data connection. In places I consistently get LTE the signal drops to H+ and I have no data connection, then after a few mins I get LTE back, This happens sporadically.
I've rebooted the phone, removed and reinstalled SIM and contacted my carrier (ROGERS) they rebooted the system from their end but the problem persists.
Anybody else experiencing this issue and if so did you solve it?
Sent from my XT1058 using XDA Free mobile app
Click to expand...
Click to collapse
My wife's Moto X would consistently drop cellular data connections but calls and WiFi were fine. Motorola had to replace the phone.
tcrews said:
My wife's Moto X would consistently drop cellular data connections but calls and WiFi were fine. Motorola had to replace the phone.
Click to expand...
Click to collapse
So it's a hardware issue? Funny this never happened before, granted I did drop my phone and cracked the screen about 3 weeks. I wonder if that has contributed to the issue?!
Sent from my XT1058 using XDA Free mobile app
Jamolah said:
So it's a hardware issue? Funny this never happened before, granted I did drop my phone and cracked the screen about 3 weeks. I wonder if that has contributed to the issue?!
Sent from my XT1058 using XDA Free mobile app
Click to expand...
Click to collapse
This has been happening to me as well on daily basis, multiple times. Im to the point of returning the device to best buy and purchase the Dev edition. I'm using an att locked device on ST. Some say its due to att APN.
StaticLinux said:
This has been happening to me as well on daily basis, multiple times. Im to the point of returning the device to best buy and purchase the Dev edition. I'm using an att locked device on ST. Some say its due to att APN.
Click to expand...
Click to collapse
Did this just start happening to you, around a week and a half ago?
Sent from my XT1058 using XDA Free mobile app
So I picked up a new (used motox) phone and it's losing connection also. So it obviously has nothing to do with the broken screen.
Sent from my XT1058 using XDA Free mobile app
I got a new SIM card and issue persists. Very annoying, and I don't understand how this just started happening. Everything was fine until about 2 weeks ago.
Sent from my XT1058 using XDA Free mobile app
Jamolah said:
I got a new SIM card and issue persists. Very annoying, and I don't understand how this just started happening. Everything was fine until about 2 weeks ago.
Sent from my XT1058 using XDA Free mobile app
Click to expand...
Click to collapse
Perhaps it is on your carrier's end. Remember, the phone can only establish and keep a data connection if the carrier's equipment is functioning properly. Who is your carrier? As a test, you could purchase a prepaid-sim on a different carrier and see if the data connection remains stable. I put a friend on H2O wireless (AT&T MVNO) and he has had zero issues with losing data connection.
Good Luck
samwathegreat said:
Perhaps it is on your carrier's end. Remember, the phone can only establish and keep a data connection if the carrier's equipment is functioning properly. Who is your carrier? As a test, you could purchase a prepaid-sim on a different carrier and see if the data connection remains stable. I put a friend on H2O wireless (AT&T MVNO) and he has had zero issues with losing data connection.
Good Luck
Click to expand...
Click to collapse
I'm with Rogers (Canada). I have contacted them twice, they end up doing something on their end. I reboot the phone, I get LTE connection then I set my phone down and next time I turn it on minutes later it goes to H+ and there's no data connection.
Sent from my XT1058 using XDA Free mobile app
I've had a similar issue, but with my XT1053 Moto X. During or after a call, my network would drop down to 4G (so H+ on the Rogers version) and I'd have no data connection. It would take a while to re-establish LTE, which gets kind of annoying. I'm not sure how to fix the issue just yet.
lcheng1 said:
I've had a similar issue, but with my XT1053 Moto X. During or after a call, my network would drop down to 4G (so H+ on the Rogers version) and I'd have no data connection. It would take a while to re-establish LTE, which gets kind of annoying. I'm not sure how to fix the issue just yet.
Click to expand...
Click to collapse
Are you still having these issues?
Sent from my XT1058 using XDA Free mobile app
Jamolah said:
Are you still having these issues?
Sent from my XT1058 using XDA Free mobile app
Click to expand...
Click to collapse
Yup. I've tested it with my S5, Nexus 5, and Z1 Compact and they all have the same issue. I'm thinking it's a Rogers thing.
lcheng1 said:
Yup. I've tested it with my S5, Nexus 5, and Z1 Compact and they all have the same issue. I'm thinking it's a Rogers thing.
Click to expand...
Click to collapse
I've contacted rogers twice, they opened a ticket with their back-end tech guys, they're going to check the towers around my house and work.
I'll keep you posted with my findings.
Also I've asked a few people I know with Rogers if their data connection is dropping and they've told me no.
Sent from my XT1058 using XDA Free mobile app
Rogers called me and said the problem has been resolved but I'm still getting data connection loss
Sent from my XT1058 using XDA Free mobile app
I'm still getting the same problem as well.
I still don't understand how this just spontaneously started to happen. And with 2 different MotoXs
Sent from my XT1058 using XDA Free mobile app
It only occurred twice today...
So it looks like it's improving.
Sent from my XT1058 using XDA Free mobile app
Moto x intermittently dropping network signal

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