What do to with your SIM
Understanding SIM Cards for New SIM only customers / Replacement SIMs / Pay as you go SIMS
Understanding SIM Cards for New SIM only customers / Replacement SIMs / Pay as you go SIMs
We’ll send you a Tri-SIM which contains all three SIM sizes available.
Check your new phone carefully to see which size you need to pop out. You can also check the phone instructions or look at your phone’s device guide for step-by-step instructions.
You’ll need to pop out the right sized SIM for your phone from the plastic card. On the back of your card you’ll see your mobile number and SIM serial number.
Your SIM will usually need to be inserted into the removable SIM tray or under the battery. If you need help with this, our device guides give you step-by-step instructions.
Your SIM will be on the side of your new phone’s box, so you’ll need to insert it into your new phone. To see how to do this, check our device guides.
Upgrading your phone
Your new phone will come with a new SIM on the side of your new phone’s box.
If you didn’t need a new SIM because your old phone and new phone take the same size SIM, simply put your old SIM into your new phone and use it as normal.
If you need to use the new SIM, you’ll need to insert this into your new phone. To see how to do this, check our device guides.
You’ll also need to switch your number to your new SIM. Whilst your number is switching over, this SIM may show as a Tesco Mobile pay as you go SIM card. This is normal and will change when your number has transferred.