https://www.att.com/device-support/article/wireless/KM1273782/Samsung/SamsungG955U
Samsung Galaxy S8 / S8+ (G955U/G950U) - Signal & Cellular Data - AT&T
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Samsung Galaxy S8+ Plus 64GB G955U GSM Unlocked 4G LTE 6.2" Super AMOLED 4GB RAM 12MP Camera...
Buy Samsung Galaxy S8+ Plus 64GB G955U GSM Unlocked 4G LTE 6.2" Super AMOLED 4GB RAM 12MP Camera Smartphone - Midnight Black - USA Version with fast shipping...