Ensure you downloaded the ROM specifically for the SM-T285 (LTE) and not the SM-T280 (Wi-Fi only).
Move both zip files to a microSD card and insert it into your tablet.
Breathing New Life into the Samsung Galaxy Tab A 7.0: A Guide to SM-T285 Custom ROMs (Android 7.0+)
Use two apps side-by-side—a game changer for a 7-inch tablet.
