I have a contract which is due for expiry with T-Mobile and they couldn't offer me the deal I wanted direct through retentions. I found a better sim only contract which is also through T-Mobile which I have ordered and intend on transfering my number to this sim. I'm aware I can transfer my number by using a PAC code from my existing contract to a PAYG sim on another network. Then I can obtain a PAC code from the PAYG provider to transfer to my new T-Mobile sim. My question is what is the best/cheapest PAYG network to use for the transfer? Im concerned the PAYG provider might make me wait for an extended period or charge a large fee for this. If anyone can point me to the best network for doing this it would be greatly appreciated.