Choose ARM , Android 7.1 , and the Pico or Nano variant (larger packages will fail due to the tablet's small system partition). Step 1: Unlock Developer Options and Enable OEM Unlock
I found the tablet in a drawer, screen dusty, battery drained. Plugging it in, the Samsung logo flared to life, followed by the agonizingly slow boot process. It was running Android 5.1 Lollipop—ancient by modern standards. Navigating the interface was like wading through molasses. Apps crashed, the home screen redrew constantly, and the 1.5GB of RAM cried for mercy. samsung galaxy tab a6 smt280 custom rom verified
Go to Install , select the ROM ZIP file from your SD card, and swipe to confirm. Install GApps: (If needed) Install the GApps ZIP file. Choose ARM , Android 7
Upgrade from Android 5.1/6.0 to Android 10+ (via LineageOS/Pixel Experience). It was running Android 5