nano SIM card

HTC One M9 uses a nano SIM card. Use a standard nano SIM card only. Inserting ...

Updating your phone's software

HTC One M9 can check and notify you if there’s a new update available. Updates for some HTC ...

Ringtones, notification sounds, and alarms

Ringtones, notification sounds, and alarms

Recording videos in slow motion

Relive high speed action bit by bit and add a touch of suspense to your videos. ...

Listening to music

Listening to music

Resetting network settings

Reset the network settings when you're having problems connecting HTC One M9 to your mobile data o...

Resetting HTC One M9 (Hard reset)

If HTC One M9 has a persistent problem that cannot be solved, you can perform a factory rese...

Turning the data connection on or off

Turning your data connection off saves battery life and money on data charges. ...

Turning location services on or off

In order to find your location on HTC One M9, you need to enable location sources. ...

Wi-Fi Calling

When you're in a place with limited cellular coverage but with Wi‍-Fi connection, use Wi-F...