Apple iPhone 8 Plus (AT&T/T-Mobile/Global/A1897)

All iPhone 8 Plus models have a 5.5" (diagonal) widescreen multitouch "True Tone" LED-backlit 1920x1080 native resolution "Retina HD" display (401 ppi, 625 cd/m2) and a taptic-engine powered solid state "clickless" Home button.
Year introduced: 2017
Capacity: 64GB and 256GB
Colors: Gold, Silver, Space Gray
Model number on the back cover: A1897

Please note that this A1897 iPhone 8 Plus model is compatible with FDD-LTE bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, and 66 as well as TD-LTE bands 34, 38, 39, 40, and 41. It is intended for use with AT&T and T-Mobile in the United States (it does not support CDMA networks such as those used by Verizon and Sprint), but it does formally support carriers in Canada, the UK, the EU, and just about all other countries in the world with the exception of China, Hong Kong, and Japan.
The model list on AT&T: MQ8V2LL/A refers to the iPhone 8 Plus in gold with 64 GB of storage . In gold, with 256 GB of storage, the order number is MQ8Y2LL/A. In silver,the order numbers are MQ8U2LL/A and MQ8X2LL/A. In Space Gray,the order numbers are MQ8T2LL/A and MQ8W2LL/A.

The model list on T-Mobile: on gold the order numbers are MQ922LL/A with 64 GB of storage and MQ952LL/A with 256 GB of storage. In silver,  the order numbers are MQ912LL/A with 64 GB and MQ942LL/A with 256 GB of storage. In Space Gray, on T-Mobile, the order numbers are MQ902LL/A with 64 GB and MQ932LL/A with 256 GB of storage.
You can check the right model in fast and reliable website: https://iphonemodel.com