Operating Instructions

Clear the entire list Press , and then tap Remove call history. Tap
Select all > Delete.
Using Assisted 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 make
calls to your contacts while roaming.
1. On the Home screen, tap .
2. Enter the phone number or first few letters of the contact's name.
3. From the list, tap a contact to call.
If you selected a contact whose phone number has a leading zero,
HTC Thunderbolt will automatically prepend it with your home
country code when dialing. If there's already a plus (+) sign and
country code before the phone number, HTC Thunderbolt will just
dial as is.
HTC Thunderbolt dials as is and does not prepend your home
country code when you call phone numbers that are not stored in
HTC Thunderbolt. When manually entering a phone number to call,
you need to enter a plus (+) sign and country code before the
number.
Editing a country’s international call settings
1. From the Home screen, press , and then tap Settings.
Phone calls 71