If you're leaving Three mobile for another network
- 1
Text PAC plus your date of birth in DDMMYY format — for example PAC060385 — to 65075 to keep your number, or STAC plus date of birth to 75075 to drop it.
- 2
Read the reply: Three includes the code and, if you're still in contract, the early termination charges that would apply.
- 3
Or sign in to My3 and go to Manage your plan > Leave Three > Get a PAC or STAC code for the same details on screen.
- 4
Give the code to your new provider within 30 days — they transfer the service and close your Three account.
- 5
Wait for the final bill, which Three sends once you've switched.
- • The text shortcuts only work with a single number on the account — Three says two or more numbers means contacting them by phone or chat instead.
- • Three documents that after requesting a STAC you won't be able to upgrade online for 30 days.
Source: three.co.uk — the provider's own documentation for these steps.