does not officially support the Samsung Galaxy Tab 3 7.0 (SM-T210R), community developers have historically worked on unofficial ports to keep this vintage hardware functional. Most "work" on this device centers around LineageOS 11 (Android 4.4) or LineageOS 14.1 (Android 7.1). Article: Resurrecting the SM-T210R with LineageOS
chipset. This specific SoC is notoriously difficult for custom ROM development due to a lack of available source code and documentation compared to more popular Qualcomm or Exynos chips. Available Custom ROM Options smt210r lineageos work
However, running modern Android versions (Android 10, 11, 12+) on this chipset presents challenges: does not officially support the Samsung Galaxy Tab 3 7
This is the highest Android version that runs somewhat acceptably on the smt210r. You can find threads on XDA-Developers under "Samsung Galaxy Tab A 9.7 (2015) – gtaxlwifi." This specific SoC is notoriously difficult for custom
stands as a "difficult" device in the hobbyist community. While LineageOS is the gold standard for extending hardware life, the closed-source nature of the Marvell chipset ensures that any "working" LineageOS build for this tablet remains a labor of love with significant compromises for the latest unofficial builds or more info on the Odin flashing process