Go to Settings > About Phone > Tap "Build Number" 7 times. Then, in Developer Options, toggle USB Debugging "On."
Android 7.0 introduced native multi-window support, perfect for older tablets.
Select "Wipe" > "Advanced Wipe." Check Dalvik/ART Cache, System, Data, and Cache. Do not wipe Internal Storage if your ROM is saved there.
Upgrading a device from Android 4.4.2 (KitKat) to Android 7.0 (Nougat) is a massive jump that spans three years of mobile evolution. While an official "over-the-air" (OTA) update is almost never available for devices this old, you can achieve this upgrade through verified community-led methods.
The bootloader is a code that runs before the OS starts. Most manufacturers lock it to prevent software changes. You must visit the manufacturer's website or use a tool like ADB/Fastboot on a PC to unlock it. Note: This usually voids your warranty and wipes your data. 2. Installing a Custom Recovery (TWRP)
Look for a Nougat-based ROM on the XDA Developers forum for your specific device.
To move to Android 7.0, you need to complete these three steps in order: 1. Unlocking the Bootloader