Choosing which SIM card to use for sending SMS and MMS

You can set which default SIM card to use for sending SMS and MMS. ...

Turning Sleep mode on or off

Sleep mode saves battery power by putting HTC Desire 12+ into a low power state while the display...

Setting up a conference call

Conference calling with your friends, family, or co-workers is easy. Make or accept a call, and then...

Backing up HTC Desire 12+

Automatically back up HTC Desire 12+ to Google Drive™ so you can restore content such as app da...

Resetting HTC Desire 12+ (Hard reset)

If HTC Desire 12+ has a persistent problem that cannot be solved, you can perform a factory r...

Changing the display language

Changing the language adjusts the keyboard layout, date and time formatting, and more. You c...

I keep exiting the game I'm playing because I pressed the RECENT APPS or BACK button by accident. How can I avoid this?

You can use screen pinning to lock your display on the game app you're playing. Pressing the hardwa...

Why won't my phone lock even when I've already set up a screen lock password?

If you've set up your screen lock PIN, password, or fingerprint scanner—if your phone has one—but t...

Installing a digital certificate

Use client and Certificate Authority (CA) digital certificates to enable HTC Desire 12+ to ac...

What's the best way to end or close apps?

Some users download third-party task manager apps to manage their apps for them. When not managed pr...