Old Android 10 builds on the K2001n lose Google compatibility. An update restores security patches and Play Store access.
Cause: The touch panel driver was swapped during the update.
Fix: Navigate blindly or use a USB mouse plugged into the unit. Go to Settings → Factory Settings (Password: 8888 or 123456). Go to "Touch Screen" and toggle between "GT9XX" and "FT5X06" drivers. Reset. K2001n Android Update
Even with the correct file, issues arise. Here are fixes for the three most common problems: Old Android 10 builds on the K2001n lose
The K2001n struggles with heavy UI. Go to Developer Options (tap Build Number 7 times) > Set Window/Transition/Animator scale to 0.5x or Off. K2001n Android Update