Ofcom has issued new mobile number portability (MNP) rules that stipulate that customers must be able to receive calls using their existing number within two hours of moving to a new mobile network; the old timeframe was within five days. The two hour transfer must be implemented by 1 September 2009. Ofcom is also requiring cellcos to cooperate in the creation of a common database to handle calls and to pave the way for more efficient call routing.