You need to flash the ROM again. Make sure you are flashing both ROM + GApps simultaneously. If it persists, reformat Data (TWRP > Wipe > Format Data – type “yes”).

variant (the 3G + Wi-Fi version). Do not attempt this on the Go to product viewer dialog for this item. (Wi-Fi only) version, as doing so will brick your device. 💾 Required Download Links

Click on the (or PDA ) button in Odin and select the downloaded TWRP .tar file. Go to the "Options" tab in Odin and uncheck Auto Reboot .

Flashing custom firmware carries inherent risks. Proceed with caution and ensure you meet all requirements before starting.

The Android 7.1.2 ROM Zip File: You can safely acquire the unified build packages directly from Android-Andi's LineageOS Rom Repository . Ensure you select the package designated for "espresso3g" or the unified series covering the GT-P5100.

Let go and immediately press to enter Download Mode, or if you already installed TWRP, you may enter recovery directly. 3. Perform a Factory Reset (Wipe Data) In TWRP: Select Wipe . Select Advanced Wipe . Check Dalvik / ART Cache , System , Data , and Cache . Swipe to Wipe . 4. Install the Firmware Go back to the main menu and select Install . Navigate to the LineageOS .zip file you downloaded. Select it and Swipe to confirm Flash . Once finished, DO NOT REBOOT yet. 5. Install GApps Go back to the Install menu. Select the OpenGApps .zip file . Swipe to confirm Flash . 6. Reboot and Setup Once both flashes are successful, select Wipe Cache/Dalvik . Select Reboot System . Note: The first boot can take up to 10-15 minutes. Known Limitations

The Samsung Galaxy Tab 2 10.1 (GT-P5100), released in 2012, is a classic Android device. While its official software support ended years ago at Android 4.2 Jelly Bean, the device's hardware is still capable of running modern applications if updated. Through custom ROMs, specifically LineageOS, you can breathe new life into your tablet by installing Android 7.1.2 Nougat.

After this, your old ROM is completely removed.

Modifying firmware voids warranties and carries a risk of "bricking" the device. Proceed at your own risk. 📥 Required Download Links

Allows your computer to communicate with your tablet in download mode.

Boot into : Press and hold the Power and Volume Down buttons simultaneously. Release them immediately when the Samsung logo flashes on screen.

Go to the Odin options tab and ensure is unchecked.

: Download the unofficial LineageOS 14.1 or OmniROM .zip file specifically for the GT-P5100 (espresso3g) .

Download the Android 7.1.2 ROM and associated files (like GApps for Google services).

In rare cases, some custom ROMs may have issues with 3G connectivity; Wi-Fi usually works perfectly.