The official firmware for the Samsung Galaxy Tab 2 10.1 (GT-P5100) peaked at Android 4.2.2 Jelly Bean. To run Android 7.1.2 Nougat , you must use a custom ROM, with LineageOS 14.1

Prerequisites:

If you're looking for a caption or post to share this process with a tech community, here is a "deep" take on breathing new life into old hardware: Title: The Ghost in the Machine: Resurrecting the GT-P5100

• Confirm exact device model.
• Read the first post and comments of any ROM thread fully; follow device‑specific instructions.
• Keep stock firmware handy to restore if needed.
• Expect limited or partially working hardware features with ports.
• Use battery >=50% and a reliable USB cable/port.
• If you are not comfortable with the steps or risk, consider leaving the device on official firmware.

It’s a slow process. You’ll need TWRP as your gateway and Andi34’s legendary builds as your map. But once you see that boot animation flicker to life, you realize that "obsolete" is just a lack of imagination. Don’t recycle your history. Reclaim it. Quick Installation Steps

File name example: lineage-14.1-20211121-UNOFFICIAL-p5100.zip
File size: ~320 MB