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Go to BasketActivating your device or SIM
To activate your SIM you just need to insert it into your phone and make a call to any number. Because we send you a Tri-SIM, you’ll never need to worry about getting the wrong size.
If you need to activate an eSIM, please take a look at our eSIM page for more support.
Before you make a call
Make sure your SIM card is in your phone – it’ll be on the side of your new phone’s box. Our SIMs are standard size with a pop-out micro or nano SIM, so they work in all phones. Make sure you check your new phone carefully to see what size you need to pop out. You can also check the phone instructions or find your specific device guide
If you are a SIM only customer, make sure the phone you’ll be using works with a Tesco Mobile SIM – you might need to ask your old network provider to unlock it.
iPhone customer?
You’ll have to update your number in the settings of your phone. To do this:
- Go to settings
- Tap phone
- Tap My Number
Getting to know your phone
Our device guides have lots of step-by-step information to help you make the most of your new phone.
Problems connecting?
If your phone shows no service or network, there could be a temporary problem with the signal in your area – you can use our coverage checker to find out. If you’re still having problems calling, please contact us.
Frequently asked questions
If you’ve upgraded your pay monthly phone and have a new SIM, when you switch your phone on the first time you may see it display ‘pay as you go’. Don’t worry, your new SIM will be activated on pay monthly.
If you need a reminder of your new pay monthly number, it’s in your contract and also in My Account.
If you’re on pay as you go, call 4444 free from your Tesco Mobile to hear your number.
Related Help
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Everything you need to know about switching -
Welcome to Tesco Mobile -
Unlock a device from another network