The A13 ET-7008b CHIPS C70+_V10 Tablet, download our tried and tested firmware in the below link it has also have the apk file touchscreen calibrator, after flash is done the function of touchscreen is inverted.install the apk file like moborobo software.
Download Firmware
Download APK Touchscreen Calibrator
Download Moborobo
Note: if touch panel faulty like invert touches function down the touchscreen calibrator here.