Managing your nano SIM cards with Dual network manager Note: Dual SIM card support varies by phone model, region, and country. ...
Software and app updates Download and install software updates for the latest performance enhancements, bug fixes, and securi...
Installing a software update When HTC U Ultra is connected to the Internet and there's a new software update available, th...
Creating an unlock pattern for some apps Add a security pattern to some installed apps that you treat as private. Lock these apps to requi...
Setting a screen lock Help protect your personal information and help prevent others from using HTC U Ultra without...
Can the phone automatically switch to the mobile network when Wi-Fi is absent or weak? Yes. You can set the phone to automatically switch to a mobile network when there's no available...
When I removed my screen lock, a message appears saying device protection features will no longer work. What does device protection mean? Starting from Android 5.1 Lollipop, Google added a feature called Device Protection that helps t...