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How to use secret codes in HTC U Ultra? Which secret codes works on HTC U Ultra? How to open hidden menu in HTC U Ultra? How to to use advanced settings in HTC U Ultra? Tipis and Tricks in HTC U Ultra. Open the phone's dialer and type in the secret codes. You can open the secret menu where you can find advanced features and detailes information. You may test here your device, read battery info and apps statistics. What's more here you can have access to HTC Function Test and check if your HTC works correctly. More Info: http://www.hardreset.info/devices/htc/htc-u-ultra/
