No 4G/LTE

[brainFireTony]

I'm having an issue with my unlocked Xperia X Performance Dual Sim (international version) where I don't get an LTE signal at all. I have AT&T as my service provider in the United States and made sure I had the correct APN settings. I have tried restarting the phone, resetting, fixing the software through My PC Companion, and taking it to the AT&T store so they can troubleshoot as well. I'm starting to think it's an issue with the phone itself. Anybody have any suggestions?

[Uliwooly]

@brainFireTony

Did they added the phone's IMEI number to their database? it seems that sometimes 4G/LTE doesn't work unless they do so and/or they enable it.

BTW, which APN settings are you using? 

[brainFireTony]

Yup, they used the IMEI when they activated the Sim card.

I'm using the mobile.att.net settings.

[Uliwooly]

@brainFireTony

Things to try

settings > more > internet settings > accept > restart the phone 

and then 

settings > more > mobile networks > Access point names > I use: 

ATT Nextgenphone

Name: ATT Nextgenphone

APN: nxtgenphone

MMSC: http://mmsc.mobile.att.net

MMS proxy: proxy.mobile.att.net

MMS port: 80

MCC: 310

MNC: 410

Authentication type: Not set

APN type: default,mms,supl,fota,hipri

APN protocol: IPv4

APN roaming protocol: IPv4

Bearer: Unspecified

[brainFireTony]

That didn't work for me. The Nextgen doesn't give me data coverage. I have to use either the AT&T or Cingular APN to get data. Only getting 3G.

[Uliwooly]

@brainFireTony

Odd, and the SIM card it's new correct? 

What if you pull down the notification bar > pull down again > LTE > is it on? 

also

settings > more > Mobile networks > Preferred network type > LTE (preferred) 

also double check the 4G LTE coverage in your area.

[brainFireTony]

Yes to all of them. I had LTE coverage on my previous phone almost everywhere, which was an Xperia Z1.

[Uliwooly]

@brainFireTony

Which SIM its set for Data ?

[brainFireTony]

They gave me an LTE supporting micro SIM.

[CameronT]

Hi @brainFireTony,

Welcome to the community.

Did you mean Nano SIM instead of Micro SIM? The Xperia X Performance uses Nano SIMs.

If you did get a Micro SIM, did you cut it to size?