This guide explains how to switch from Three to iD Mobile and keep your mobile number.
Most number transfers complete within 1 to 2 working days once iD Mobile has your PAC code.
If you want a new number instead, text STAC to 75075 and give the code to iD Mobile.
iD Mobile runs on Three's network, so your coverage will not change when you switch. You are changing provider, but your signal will still use the same network.
Joining iD Mobile and leaving Three
Select which network you would like to switch from and to and we will give you precise instructions on how to keep your number when switching to a new SIM Only Deal. Show Quick Links
- Transfer your number from 1pMobile to iD Mobile
- Transfer your number from Asda Mobile to iD Mobile
- Transfer your number from Chattr to iD Mobile
- Transfer your number from EcoTalk to iD Mobile
- Transfer your number from EE to iD Mobile
- Transfer your number from Giffgaff to iD Mobile
- Transfer your number from Grade Mobile to iD Mobile
- Transfer your number from Honest Mobile to iD Mobile
- Transfer your number from Lebara to iD Mobile
- Transfer your number from Lycamobile to iD Mobile
- Transfer your number from Mozillion to iD Mobile
- Transfer your number from O2 to iD Mobile
- Transfer your number from ParentShield to iD Mobile
- Transfer your number from Sky Mobile to iD Mobile
- Transfer your number from Smarty to iD Mobile
- Transfer your number from Spusu to iD Mobile
- Transfer your number from Talk Home to iD Mobile
- Transfer your number from Talkmobile to iD Mobile
- Transfer your number from Tesco Mobile to iD Mobile
- Transfer your number from Three to iD Mobile
- Transfer your number from Vodafone to iD Mobile
- Transfer your number from Voxi to iD Mobile
To keep your number, request a PAC code from Three and give it to iD Mobile.
You can usually give iD Mobile your PAC code when you order, or after your new SIM card or eSIM has been activated.
1. Request a PAC code from Three
Here is how to get your PAC (Porting Authorisation Code) from Three:
- Text: Text "PAC" to 65075 from your Three phone. You will get a text back with your code within a minute. This is a free service from Ofcom (the UK's communications regulator).
- Online: Log in to My3 or the Three app and go to Manage your plan, then Leave Three, to request your PAC code. You can also ask via live chat on Three's website.
- Phone: Call 333 from your Three phone or 0333 338 1001 from any other phone.
- In-store: Visit a Three store and request a PAC code from a member of staff.
2. Order a SIM only deal from iD Mobile
If you have not ordered yet, compare current iD Mobile SIM only deals below.
5G
5G
5G
If you already have your new SIM, continue to Step 3.
If iD Mobile asks for your PAC code during checkout, enter it there. If not, wait for your new SIM or eSIM to activate, then give iD Mobile the PAC code using the method below.
iD Mobile includes free data rollover on all pay monthly plans, carrying unused data into the next month.
iD Mobile offers eSIMs, so you can switch without waiting for a physical SIM to arrive.
3. Give the PAC code to iD Mobile
Once you have your PAC code, here is how to give it to iD Mobile:
- Online: Enter your PAC code at checkout when you order, or fill in iD Mobile's number transfer form once your new SIM is active.
- Live chat: Contact iD Mobile's live chat team through the Help and Support page.
4. Wait for your number transfer to iD Mobile to complete
iD Mobile will send the transfer request to Three.
Your number should move to your new iD Mobile SIM within 1 to 2 working days.
Tell your friends.