O2 Follow the link to keep your existing number
Vodafone Follow the link to keep your old number, or to cancel your old number
Asda mobile or call 2732 from your ASDA mobile to request the transfer
Giffgaff activate your new SIM with the following link, and follow the instructions to transfer your number
EE First verify your EE phone number, before filling out the transfer form
VOXI Follow the link to sign into VOXI, to begin the process of transferring your number
Smarty Sign into your Smarty account, and go to: Menu > Account Settings > Your phone number > Enter my PAC or STAC code
Tesco Mobile First register your new Tesco Mobile number. Sign into your Tesco Mobile account, and go to the Move My Number section. Alternatively you can call 1903 from the number you wish to keep.
Lebara Go to the attached link. Please not that you must activate your new Lebara phone number; by placing the Lebara SIM into a phone, before you can transfer your number
Lyca Mobile Follow the link and fill in the required information.
Three If you are on PAY AS YOU GO, you first need to sign into My3 > Select Account > Click Move your number to Three. If you pay your SIM monthly, please fill in this online form
iD Mobile Follow the attached link and fill in the required information to transfer your number to iD Mobile
Sky Click on the link and navigate to the bottom of the page to transfer your number. You will be prompted to first sign into your Sky account
BT Login into your BT account, and fill in the required information to transfer your number.
Talkmobile Click on the following link, and fill in the required information. You will receive a security code to your temporary Talkmobile phone number
Virgin Mobile The following guide explains the process of moving your number to Virgin Mobile. You will be asked if you want to keep your number when you sign up to Virgin Mobile. If you did not request to transfer your number when signing up, you can do so afterwards by signing into your Virgin Mobile account, and click on switching
PlusNet Mobile Sign up to a PlusNet Mobile deal, and provide your PAC code when completing your order