HTC One M8 - Manual (Page 93)

Blocking a caller
When you block a phone number or a contact, all calls from the phone number or
contact will be declined automatically.
On the Call History tab, press and hold the contact or phone number you want to
block, and then tap Block contact.
You can always remove a caller from your blocked list. On the Call History tab, tap
> Blocked contacts. Press and hold a contact, and then tap Unblock contacts.
Changing ringtone settings
Switching between silent, vibrate, and normal modes
Do one of the following:
§ To change from silent to normal mode, press the VOLUME UP button.
§ To change from vibrate to normal mode, press the VOLUME UP button twice.
§ Go to Settings, and then tap Sound > Sound profile.
Lowering the ring volume automatically
HTC One has a quiet ring feature that automatically lowers the ring volume when you
move it.
1. Go to Settings, and then tap Sound.
2. Select the Quiet ring on pickup option.
Making HTC One ring louder in your pocket or bag
To help avoid missing incoming calls when HTC One is in your pocket or bag, the
pocket mode feature gradually increases the ring volume and vibrates when you
receive a call.
1. Go to Settings, and then tap Sound.
2. Select the Pocket mode option.
Home dialing
When you're on a trip abroad, it's easy to dial friends and family from home.
Your home country code is automatically added when you call your contacts while
roaming. But when manually entering a phone number to call, you need to enter a plus
(+) sign and country code before the number.
Using a roaming service may incur additional charges. Check with your mobile
operator for rates before using a roaming service.
93 Phone calls