Complex sentence: Vodafone subscriber numbers in Greece begin with the 3 digit code 694 followed by a seven digit subscriber number, although due to the advent of number portability in Greece, it's possible for customers to take their number to another network with them.
Split into simpler sentences: Vodafone subscriber numbers in Greece begin with the 3 digit code 694 followed by a seven digit subscriber number. Although due to the advent of number portability in Greece, it's possible for customers to take their number to another network with them.