The condition of using
AT&T 3G/4G LTE frequencies

3G

  • 850 MHz  (Band 5)
  • 1900 MHz PCS (Band 2)

Your device must support WCDMA/HDPA+ 850 and 1900.

4G LTE 

  • 1700/2100 MHz AWS (Band 4)
  • 700 MHz (Band 17)
  • 1900 MHz PCS (Band 2)
  • 850 MHz  (Band 5)

If your mobile device supports Band 2 & Band 4 & Band 17, you can use it in most LTE radio reception range of AT&T.

Note: 2G GSM 850/ 1900MHz network was sunsetted as of 1/1/2017.
Devices with these specs only no longer operate on AT&T’s network.

The following smartphones are some common examples of devices compatible with all AT&T 4G LTE B4, B2, B17 and B5.

iPhone :
iPhone SE, 6s/6s+, 7/7+ , 8/8+, X , XR, XS / XS Max, 11/11Pro/11Pro MAX
Huawei : P9 Lite 2017, P20 Pro, Mate 9, Mate 20 Pro, View 10
One Plus : OnePlus 5/5T, OnePlus 6/6T
Samsung : Note 8, S6 Edge+, S8/S8+
Xiaomi : Mi MIX 2S, Mi 8, Mi 8 Pro
Motorola : Z , Z Play, Z2 Force Edition

The following smartphones are some common examples of devices compatible with AT&T 4G LTE B2 and B4.

iPhone : iPhone 6 / 6+
Xiaomi : Redmi 6/6A, Mi A2/A2 Lite, Mi 8 Lite
Samsung : Galaxy S5, A5 (2017)

The following smartphones are some common examples of devices compatible with AT&T 3G.

iPhone : iPhone 4 / 5 / 5s /5c
Huawei : P8 Lite, P9 Lite, P10 Lite, P20 Lite, Honor 10, P Smart.
OnePlus : OnePlus2, OnePlus 3/3T
Samsung : Galaxy S5/S5mini, A5 (2015/2016), A6 , A7, J5(2016/2017), J6+
Xiaomi : Redmi 4/4X, Mi A1, Mi6 , Pocophone F1
Motorola : Moto G5/G5 Plus,  Z2 Play

All models shown above are the source of the official websites including, but not limited to.
Models’ frequencies bands may differ depending on the region which they sold.