6906 Z-1 model cannot access AT&T 4G LTE Network

[davidsouthall]

Hi, I live in the USA, I have unlocked 6906 model from Canada, bought from GSM nation. com. Its advertised that the 6906 model is LTE 4G compatible. I have an account w/ AT&T for 9 yrs w/ 4G LTE on 3 different phones (Family plan). Since I bough my Sony Z-1 I have gotte only H or H+ on the hpsa network. I called AT &T and they had me change the settings for LTE 4G on the Z-1, but I still dont receive it. Anybody can help w/ this??? Frustrating.

[Thommo]

Have you downloaded and installed the right settings for your mobile internet and MMS

[Uliwooly]

Settings > more > mobile networks > access point names > menu > add New

Name AT&T Phone

APN phone 

MMSC http://mmsc.mobile.att.net

MMS proxy   proxy.mobile.att.net

MMS port  80

MCC 410

Authentication type: none

APN type    mms,default,supl

APN protocol IPv4

Bearer   Unspecified

Menu > save 

[davidsouthall]

Thanks, I put the settings in that you said. I had called AT&T and they gave me diffrerent ones. I did this prior to your posting, and the ones they gave me didn't help. I put yours in and I noticed my "H" or "H+" sign by the 4 bars at the top of my phone disappeared. It had always said H or H+ with the settings the way they were. Should it say for 4G LTE now? Or should it be something different?

Thanks, David

[davidsouthall]

These settings did not work. They would not even connect to the internet or google play. My phone then "auto searched" by itself to start downloading AT&T's internet & mms settings so they could work. SO, I'm back to working w/ "H" and "H+" :((((. I dont understand why my phone will not pick up AT&T's 4G LTE network! sigh, so frustrating.

[Uliwooly]

keep in mind that LTE its not available everywhere, restart your phone and check again 

[samven582]

You need to go to your local ATT store. For some reason ATT doesn't allow unlocked LTE devices to work on its network. Only ATT branded LTE phones (i.e galaxy s series) will work. Have sale assoicated put in a fake imei number of one of there LTE phones and it should work.

[Uliwooly]

that is true but he has other LTE devices, I should have asked if you are using one of those mico SIM cards that do work with the other devices 

[Braddington]

Wait, if I understand this correctly, which kind of scares me, I cannot get LTE if buy an unlocked Sony Xperia Z1 C6906 from Sony's website because AT&T prohibits devices that aren't locked to their network to work on their LTE network? 

[Uliwooly]

That's correct but there's a lophole, like it was suggested above 

you need to get the IMEI number from a branded AT&T phone > stop by a AT&T store > ask them to add it to your account, then and only then you will be able to use AT&T's LTE