The Correct Mobile Number Format:

Country Code without the leading "00 or +",
Network prefix without the leading "0" if found,
Number, no spaces, only numerals.

Examples:
SA: 27821234567 (Country Code = 27, network prefix = 82, number = 1234567)
USA: 12481234567 (Country Code = 1, network prefix = 248, number = 1234567)

Eg. the number in the UK (+44) 0848 9123 456 becomes 448489123456