This guide explains how to switch from Mozillion to Chattr and keep your mobile number.
Most number transfers complete within 1 to 2 working days once Chattr has your PAC code.
If you want a new number instead, text STAC to 75075 and give the code to Chattr.
Joining Chattr and leaving Mozillion
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
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To keep your number, request a PAC code from Mozillion and give it to Chattr.
You can usually give Chattr your PAC code when you order, or after your new SIM card or eSIM has been activated.
1. Request a PAC code from Mozillion
Here is how to get your PAC (Porting Authorisation Code) from Mozillion:
- Text: Text "PAC" to 65075 from your Mozillion 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).
- Phone: Call Mozillion on 020 3893 8441.
- Email: Email help@mozillion.com and request your PAC code.
- Online: Use Mozillion's online contact form to request your PAC code.
2. Order a SIM only deal from Chattr
If you have not ordered yet, compare current Chattr SIM only deals below.
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5G
5G
If you already have your new SIM, continue to Step 3.
If Chattr asks for your PAC code during checkout, enter it there. If not, wait for your new SIM or eSIM to activate, then give Chattr the PAC code using the method below.
Chattr includes EU roaming at no extra cost, and everything is handled online rather than in-store.
Chattr does not run a credit check, so there is nothing to wait for during sign-up.
Chattr offers eSIMs, so you can switch without waiting for a physical SIM to arrive.
3. Give the PAC code to Chattr
Once you have your PAC code, here is how to give it to Chattr:
- At checkout: Enter your PAC code when you order your Chattr SIM.
- Email: If you have already ordered, email your PAC code and the number you are transferring to hello@chattr.co.uk.
4. Wait for your number transfer to Chattr to complete
Chattr will send the transfer request to Mozillion.
Your number should move to your new Chattr SIM within 1 to 2 working days.
Tell your friends.