Samsung Galaxy Tab E T377A 16GB 8" 4G LTE Wi-Fi AT&T Locked Tablet Good. 1.5GB RAM, 16GB ROM. If your carrier is a GSM carrier, you need to call and talk to their tech support to find out what frequency band they are using, then check the frequencies for the phone that you are buying to make sure it supports all the frequencies (Bands) to make sure full compatibility.