Philips t3500 how to open usb debugging

1. Go to "Settings"--"About Device"--find version number" or "kernel version";

2. Quickly click on "version number" or "kernel version" several times in a row to see "version" or "kernel version".

2. Click "Version" or "Kernel Version" several times in a row to see "Developer Options";

3. Enter the Developer Options, you can find "usb debugging", and then turn it on.