How can one make an international collect call from Los Angeles to London?

- From the U.S., this is 011

Dial the country code for the United Kingdom:

- 44

Dial the area code for London:

- 20 (London Landlines - remove first '0' when dialling from overseas) e.g. (Remove the '0' from) "0123 456789" and input as: "123 456789."

London Mobile Phone: Prefix a mobile number beginning with '07" with "+44 7."

Dial the local phone number in London:

- For mobile numbers this will consist of seven numerals: "1234567"

This would then become: "+447123456789"