Confirm you are on a UIS7862/FYT system. Check your "System Version" in settings; it usually starts with something like Recovery Plan: Keep a USB drive smaller than 8GB formatted to
If you have a backup of your original firmware and a USB mouse (to navigate a potential screen misalignment), flash a pre-rooted mod. The audio improvements and boot speed alone are worth the 20-minute learning curve. uis7862 firmware better