You're in the right place to get your new O2 sim working.
You can use this handy sim swap tool for any size plastic sim and our eSIM.
If you're new to O2, you don't need to swap your sim - you'll already have the right one.
Before we get started, you'll need:
Your O2 mobile so we can text you a code.
The 13 digit sim serial number (SSN) of your new sim which begins with 00. This will be on the back of your plastic sim, or on your eSIM pack.
Sim swaps usually take less than an hour. But if we're really busy, it can take up to 24 hours.
Step 1 Enter your mobile number
We need to check your phone is yours. Just type your mobile number in the box below and click submit. We'll text you a code that you'll need to enter on the next screen.