Before attempting to install any custom ROM on the SM-T210R, you must:
Be extremely careful when flashing. Using files intended for the LTE version (SM-T217S) or other variants can hard-brick your device. LineageOS Wiki for this specific tablet model on XDA? Samsung Galaxy Tab 3 7.0 LTE - LineageOS Wiki sm-t210r lineageos
If you find a compatible unofficial ROM, you will need the following: TWRP Recovery: You must install a custom recovery like to flash any custom software. Samsung Odin tool on a PC to flash the initial recovery. Root Access: Before attempting to install any custom ROM on
Samsung Galaxy Tab 3 7.0 (SM-T210R) is an older device that does not have official support. Because it uses a Marvell PXA986 Samsung Galaxy Tab 3 7
The first boot takes a long time (5–10 minutes). Do not panic if you see the LineageOS boot animation for a while.
Before you begin the installation process, make sure you've completed the following steps: