How to Enter Factory Mode in ULEFONE Vienna - Use Factory Test Mode

Learn more info about ULEFONE Vienna: https://www.hardreset.info/devices/ulefone/ulefone-vienna/ Would you like to find out the secret combination of keys which allows you to open the hidden mode called Factory Mode on your Ulefone device? Take a look at the above instruction in order to enable factory mode and accomplish the auto test, manual test or bring back the default configuration on your device. How to boot factory mode in ULEFONE Vienna? How to open factory mode in ULEFONE Vienna? How to quit factory mode in ULEFONE Vienna? How to exit factory mode in ULEFONE Vienna? How to use factory mode in ULEFONE Vienna? Follow us on Instagram ► https://www.instagram.com/hardreset.info Like us on Facebook ► https://www.facebook.com/hardresetinfo/ Tweet us on Twitter ► https://twitter.com/HardResetI