14 Replies Latest reply: Nov 15, 2013 3:51 PM by tidbits RSS

Unlocked AT&T phone - Edge speeds

I have an HTC Windows Phone 8X that is branded AT&T, and is carrier unlocked. I am using my T-Mobile SIM card, but am only getting EDGE data speeds. I contacted HTC and here is their response:

 

Thank you for your email. It is my understanding that your AT&T branded Windows 8X phone will not work on anything other than Edge on the T-Mobile network.


Bryan, we can only guarantee that the phone will work properly on the AT&T network as it was designed for this network. If the phone will not pick up other than Edge, then that has to do with the frequency range that T-Mobile's network has allocated to you.


The network specs for the AT&T Windows 8X are:

GSM/GPRS/EDGE: 850/900/1800/1900 MHz HSPA/WCDMA: 850/1900/2100 MHz LTE:700/850/AWS/1900 MHz


The network specs for the T-Mobile Windows 8X are:

GSM/GPRS/EDGE: 850/900/1800/1900 MHz HSPA/WCDMA: 850/1900/2100 MHz


If you know someone with an active AT&T SIM card, put that in your phone. If the phone gets 4G, then you will know for certain that it is not the phone.


I had an HTC Sensation and was getting 4G speeds in my coverage area. The frequencies are the same on the AT&T and T-Mobile HTC 8X phones, so I don't understand why I can't get 3G data speeds?