Add password to LENOVO Tab M10. To add a password, first you need to open Settings, and select Phone unlock. Then choose Set passcode at the bottom of the screen. Select Pattern from the current menu. Draw a pattern of your choice, (it needs to connect at least 4 points). Draw it again to confirm.
Type ####2222# special code to find out the Serial Number of your LENOVO Smart Tab M10 HD Wi-Fi. ####3333# code gives you transfer to the LenovoLogger, where you have chance to check the Log size limit, enable Ramdump and Oxdm and also read Main, Kernel, TCP, radio and other logs. Help!
Enable USB debugging on your Lenovo Tab M10 (HD) TB-X505F and turn off the device. Now you will see the recovery mode on your Lenovo Tab M10 (HD) TB-X505F . Connect the Lenovo Tab M10 (HD) TB-X505F with your pc using usb cable. Now open the Android Multi Tools and select wipe data.Lenovo Smart Tab M10 HD Wi-Fi Hard Reset from Recovery Mode. Power off your phone. Now, boot Lenovo Smart Tab M10 HD Wi-Fi into Recovery Mode. When the device boots into Recovery, highlight the wipe data/factory reset option using Volume keys and select it using the Power button. Now, select the Yes -- delete all user data option and press the yeYYj.