November 19th, 2013, 11:51 AM
Join Date: Jul 2011
Location: Rochester, NY
Device(s): Nexus 5, Asus TF700, Google Glass, LTE Nexus 7(2013), Logitech Revue, Chromecast
Carrier: T-Mobile USA
Thanked 5,742 Times in 3,239 Posts
The difference between them often relates to which radio frequencies they support for data and which apn you use. Often in the past, AT&T phones didn't contain the compatibility to use T-Mobile's HSPA+ network because of frequency incompatibility. Most AT&T phones these days will work with T-Mobile LTE, but HSPA is still hit or miss. If you want to fully use T-Mobile's network, your best option is to buy the T-Mobile variant or the Google Edition.
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Current Devices: Nexus 5, Asus TF700, Google Glass, (2013) LTE Nexus 7, Logitech Revue, Chromecast
Retired: Samsung Fascinate, Droid Charge, Galaxy Nexus, (2012) WiFi Nexus 7, Nexus 4