The Galaxy S III provides many convenient ways for you to make calls. You can manually enter numbers, dial a number from a contact record, use the call log to return missed calls and redial numbers, call embedded numbers in text or email messages, create and use speed dial entries, and make three-way and emergency calls.
With or Without the 1
When dialing a number, you need to add the dialing prefix/country code only when you’re calling a country that uses a different code. As a result, most numbers that you dial manually, as well as ones stored in Contacts, can either omit or include the dialing prefix.
You can use the Keypad section of the Phone app to manually dial phone numbers. The procedure differs slightly ...