HTC One A9s
Guide Downloads
FAQ
Calls and SIM
Can I cut my micro SIM to a nano SIM so it can fit in my phone?
Backup and transfer
How do I back up my photos and videos?
How do I copy files between my phone and computer?
I was using HTC Backup before. Why isn't HTC Backup available on my phone?
How do I get HTC Sync Manager to recognize my phone?
Audio and display
I think my microphone is broken. What should I do?
Can I change the system font style and size on my phone?
How do I set my favorite song or music as my ringtone?
Camera
Can I keep the camera on standby to save battery, and how?
Photos appearing blurred? Here are some tips
Wireless and networks
Can the phone automatically switch to the mobile network when Wi-Fi is absent or weak?
How do I share my phone's Internet connection with other devices?
How do I know if my phone can be used in another country's local network?
I sent some files via Bluetooth to my computer. Where are they?
How do I add the access point to my mobile operator's network?
Storage
How do I copy or move files and folders to my storage card?
How do I view the files and folders from my USB drive?
When formatting my storage card for use as internal storage, I see a message saying the card is slow. Why is that?
My phone is brand new, but the available storage is lower than the total capacity. Why is that?
What's the difference between using the microSD card as removable storage and internal storage?
Security
Why doesn't the phone wake up when I touch the fingerprint scanner?
Why can't I unlock the screen with my fingerprint when using Exchange ActiveSync?
How do I get past the Google login screen after I reset my phone?
What can I do if I forgot my screen lock password, PIN, or pattern on my phone?
What should I do when my phone gets lost or stolen?
What is Smart Lock and how do I use it?
Why am I prompted to enter a password to decrypt my phone when I restart or turn it on?
When I removed my screen lock, a message appears saying device protection features will no longer work. What does device protection mean?
System performance
How do I check the latest software updates for my phone?
How do I troubleshoot my phone when there's a problem?
Why is my phone acting sluggish and freezing?
Why does my phone turn off by itself?
What should I do if my phone gets too warm or hot?
What's the best way to end or close apps?
How do I check how much memory my phone has and how much memory is being used?
How do I restart my phone into Safe mode?
Applications
Why is my phone not responding to Motion Launch gestures?
What does "Verify apps" do, and how do I check if it's enabled?
How do I sign in to my Microsoft email account from the Mail app?
Why are the apps on my phone crashing and force closing?
How do I know if I've installed a malicious third-party app on my phone?
Can I do the same things in Google Photos that I used to do in HTC Gallery?
How do I set the default SMS app?
How do I see the list of running apps?
I keep getting prompted to grant permissions when using apps. Why is that?
Why can't I use multi-finger gestures in my apps?
How do I enable developer's options?
Settings and others
How do I find the IMEI/MEID and serial number of my phone?
Why is my phone talking to me? How do I turn this off?
How do I enable or disable a device administrator app?
Power and charging
What can I do if my phone will not power on?
How do I reboot the phone using hardware buttons?
What can I do if my phone keeps rebooting or won't boot all the way to the Home screen?
What should I do if my phone will not charge?
Why does my battery drain so quickly?
How does Doze mode save battery power?
Why are Power saver and Extreme power saving mode both grayed out?
How does App standby in Android save battery power?
In Settings, what is Battery optimization used for?
How do I save battery power?
< < Menu
How do I enable or disable a device administrator app?
Go to
Settings
>
Security
.
Tap
Device administrators
.
Tap the administrator app, and then tap
Activate
or
Deactivate
.
Submit
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