This guide explains how to switch from Chattr to O2 and keep your mobile number.
Most number transfers complete within 1 to 2 working days once O2 has your PAC code.
If you want a new number instead, text STAC to 75075 and give the code to O2.
Chattr and O2 both run on O2'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 O2 and leaving Chattr
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 O2
- Transfer your number from Asda Mobile to O2
- Transfer your number from Chattr to O2
- Transfer your number from EcoTalk to O2
- Transfer your number from EE to O2
- Transfer your number from Giffgaff to O2
- Transfer your number from Grade Mobile to O2
- Transfer your number from Honest Mobile to O2
- Transfer your number from iD Mobile to O2
- Transfer your number from Lebara to O2
- Transfer your number from Lycamobile to O2
- Transfer your number from Mozillion to O2
- Transfer your number from ParentShield to O2
- Transfer your number from Sky Mobile to O2
- Transfer your number from Smarty to O2
- Transfer your number from Spusu to O2
- Transfer your number from Talk Home to O2
- Transfer your number from Talkmobile to O2
- Transfer your number from Tesco Mobile to O2
- Transfer your number from Three to O2
- Transfer your number from Vodafone to O2
- Transfer your number from Voxi to O2
To keep your number, request a PAC code from Chattr and give it to O2.
You can usually give O2 your PAC code when you order, or after your new SIM card or eSIM has been activated.
1. Request a PAC code from Chattr
Here is how to get your PAC (Porting Authorisation Code) from Chattr:
- Text: Text "PAC" to 65075 from your Chattr 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).
- Email: Email Chattr at hello@chattr.co.uk to request your PAC code.
Chattr is an online-only network with no stores or phone line.
2. Order a SIM only deal from O2
If you have not ordered yet, compare current O2 SIM only deals below.
5G
5G
5G
If you already have your new SIM, continue to Step 3.
If O2 asks for your PAC code during checkout, enter it there. If not, wait for your new SIM or eSIM to activate, then give O2 the PAC code using the method below.
O2 plans include access to Priority rewards and presale tickets once your SIM is active.
O2 offers eSIMs, so you can switch without waiting for a physical SIM to arrive.
3. Give the PAC code to O2
Once you have your PAC code, here is how to give it to O2:
- Online: Enter your PAC code at checkout when you order, or log in to My O2: on the website go to Switch to O2, then Move my number; in the app go to Support, then Keep your number.
- Phone: Call 202 from your O2 phone or 0344 809 0202 from any other phone.
- In-store: Visit an O2 store and give a member of staff your PAC code.
O2 usually completes the switch by 4pm on the transfer day, and by 10pm at the latest.
4. Wait for your number transfer to O2 to complete
O2 will send the transfer request to Chattr.
Your number should move to your new O2 SIM within 1 to 2 working days.
Tell your friends.