What would I dial if I am in the U.S. calling from my iphone to another iphone in the UK? Number I am calling from:( 314)369-9618 to (314)749-4708. Both are numbers in the U.S., but one person will be traveling to the UK.
If you want to call from the US an American number in the UK, you can dial the number without adding the calling code. Ask your carrier if you will not pay a fee for your call.
For the US number in the UK, your contact will need to add the US calling code (+1 or 001) when dialing your phone number.