An absolute joke!!! Do not go with O2!! Be it on your head if you do!! Failure to transfer my number correctly, meaning I'm currently without a phone, also swapped my son from pay as you go to monthly....his number that should have been put into his new sim, has now been transferred onto my sim, so not only has he got the wrong number, I now have his number, and my original number that I've had for over 15 years, has completely disappeared!!!! O2, laughing stock of the mobile world!!!!!!