1) Check you’re eligible to switch from Vodafone
If you’re out of contract, you can switch your contract. To check your contract status, you can either:
Open up the Vodafone app on your phone. Then click on the menu icon on the top right of the screen. Next, click on ‘Upgrade or change plan’ in the second menu that appears.
Now, click on ‘Change plan’ and you’ll see your contract termination date under the heading labelled ‘Agreement length’.
If you don’t have the Vodafone app, you can check your contract end date by logging into your account on the Vodafone site.
Prefer to call? Get in touch with Vodafone's customer support team on 191 on your Vodafone phone. Or on 03333 040 191 from any other phone (standard network charges apply).
Opening hours are 8am-9pm every day.
If you’re keeping your old phone and signing up for a new SIM-only deal with a new network, there’s a chance you may need to get your phone unlocked.
To do this, you’ll need what Vodafone calls a Network Unlock Code (NUC). This is free to obtain and you can get hold of it by filling in a form on Vodafone’s site.
2) Contact Vodafone to cancel your contract
Now your phone or SIM card is on its way, you need to contact Vodafone to tell them you want to leave. When you tell them, they’ll give you a concrete contract end date.
While you’re on the phone to Vodafone, remember to ask for your PAC Code. It’s a short, alphanumeric code that you’ll use to transfer your phone number to the network that you’re going to join.
Vodafone is legally obliged to supply your PAC Code within two hours of you requesting it. When you’ve got your code, it’s smart to make a note of it. Just in case.
But the most important thing to note is that your PAC Code expires after 30 days. So if you haven’t used it in this timeframe, you’ll have to request a new one from Vodafone.
3) Find and buy a new phone or SIM deal from Three
Out of contract and ready to switch? Good news. Your next task is to sign up for a new phone contract or SIM only deal from Three. Once you’ve passed Three’s credit checks, you’ll receive your phone in the post.
4) Contact Three to give them your PAC code
We’re almost there now. Next you’ll just to ring Three to give them your PAC. You can reach their customer support team on 0333 338 1001 from a landline (standard network rates apply).
5) Insert your new Three SIM card
If you got a new phone as part of your contract, take the pin-key included in the box and unlock the handset's SIM tray. Then insert your Three SIM card.
If you went for a SIM-only deal instead, you can just put the Three SIM in your existing phone.
While the number transfer is taking place, you’ll be given a temporary phone number that you can use and on which people can contact you.
6) Wait for your number to be transferred
The transfer should be complete the next working day. However, this can vary from network to network and sometimes depends on whether the day after you make your call is a working day or a weekend.