Android - How can I calibrate the tilting sensor on Android
It's a tough one to answer, as I'm not sure what version of Android you are running, and you have stated it may be a clone.
Method 1:
Open "Settings"
Find "Motion" and tap on it
Scroll down the menu and tap on "Sensitivity Setting"
Open "Gyroscope calibration"
Place device on a level surface and tap Calibrate
Method 2:
Download 'G-Sensor' from the Samsung Apps store pre-installed on your device. Here is a weblink.
Method 3:
Download Bubble Level from the Google Play store, this has a calibration option also.