1) Check you’re eligible to switch from Three
In the event that you’re out of contract, you’re free to switch whenever you like for no charge.
To find out your contract end date, you can:
Open up the Three app on your phone. Then click the ‘Plan’ icon at the bottom and scroll to the foot of the page, where you’ll find the date you’re free to leave.
Don’t have Three’s mobile app? No problem. You can also check your contract end date by logging into your Three account on Three’s site.
Prefer to call? You can get in touch with Three's customer support team on 333 from your Three phone. Or on 0333 338 1001 from any other phone (standard network charges apply).
2) Contact Three to cancel your contract and get your PAC code
Okay. Now we’re really moving. With your new phone or SIM card winging its way to you, the next thing you need to do is ring Three and tell them you’d like to leave. At this point, you’ll be given a contract end date.
You can contact Three's customer support team by calling 333 from a Three phone. Or on 0333 338 1001 from any other phone.
While you’re on the phone to Three, you also need to ask for a PAC Code. This is a short, alphanumeric code that you’ll need to transfer your phone number to the network you’re joining.
Three is bound by law to provide you with your code within two hours of your request. Once you’ve got the code, it’s a very good idea to make a note of it.
Your PAC code expires after 30 days. So if you haven’t used it within this timeframe, you’ll have to contact Three to get another one.
3) Early upgrades
Three does not offer a mid-contract early upgrade scheme that’s comparable to O2 Refresh or Tesco Mobile’s Anytime Upgrade.
However, customers on Three’s phone and contract plans are offered an upgrade with 30 days remaining on their contract.
4) Find and buy a SIM-only deal from BT Mobile
Next up, you’ll need to select a deal from BT Mobile and sign up for it through uSwitch.
BT Mobile will run some credit checks. After which point, your phone will be sent to you in the post.
5) Contact BT Mobile to give them your PAC Code
OK, it’s time to get in touch with BT and give them your PAC Code. Once you’ve done that the process of transferring your number to BT Mobile is in motion.
Get in touch with BT by calling 0800 800 150 (standard network rates apply). Opening hours are 8am-8pm Monday-Friday and 9am-6pm Saturday and Sunday.
6) Insert your BT Mobile SIM
Got a new phone from BT Mobile? Use the pin in the box to open the SIM tray and insert your new BT Mobile SIM.
If you opted for a SIM only deal, you'll just need to put the BT Mobile SIM in your existing phone.
The number transfer doesn’t happen instantly. But while it’s taking place, you’ll have a temporary number that you can use.
7) Wait for your number to be transferred to BT Mobile
BT Mobile typically completes number transfers the next day. However, it may take a bit longer, depending on how early in the day you made your request.
If there’s a weekend or Bank Holiday in the way, this may also hold up your transfer a little bit.