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Swap your sim

You're in the right place to get your O2 4G sim working.

You can also use our handy sim swap tool for:

  • standard sims

  • micro sims

  • nano sims

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 sim serial number (SSN) of your new sim - it’s printed on the back and is up to 19 digits.

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.




O2 Guru tip
Before you get started, make sure you back up all your important bits. Contacts, calendar, photos, music or anything else you might need.

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