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How to change your mobile number

by SamsungFanBoy on ‎02-08-2019 15:18 - last edited on ‎02-08-2019 15:27 by Community Manager (5,805 Views)

Get a new O2 mobile number


You can do this by simply calling customer services on 202 (Pay Monthly) or 4445 (Pay as you go).

O2 will allow you one free mobile number change should you wish to change it.

After that you will be charged a one off fee of £35.00 if you want to change again.


Things to keep in mind: 

  • If you call to change your number and call from the number you want to change, the call will get disconnected as part of the process. The number change is processed and a new number is auto-allocated, which disconnects the existing number immediately.
  • If you can call from an alternate number, you will be able to finish the conversation and get the new number from the advisor. Otherwise, you will have to call someone to find out what your new number is once it’s complete.


Change your O2 mobile number to your previous number

Alternatively, if you have a SIM card from another provider which you don't use anymore and is still active, you can transfer your number across to your current O2 SIM card free of charge by calling one of the above customer service numbers after obtaining your PAC code.


You can do this by texting PAC to 65075. More information on that process in our Guide: How to get your PAC 2019 Update and Guide: Migration & porting into O2.


I want to keep my number, but am getting a lot of unwanted calls: what can I do?

If you'd rather keep your current O2 number but you're getting nuisance calls, you can register with the Telephone Preference Service (TPS) for free and will dramatically reduce cold calls from companies after 28 days. This service is free of charge.

Register by visiting the website or by texting TPS and your email address to 85095.

It is also worth noting that most modern smartphones have a call block feature which will block all calls and texts from a number. Settings differ from handset to handset so please check your user guide to find out how if you don't know. Once the call block is in place, the person you've blocked will be diverted straight to your O2 Voicemail. If you want to switch that service off and have O2 Call Alert instead which notifies you of missed calls when your phone is switched off or out of service then call 1710 free from your O2 handset.


More info on this in our Guide: Are you fed up with spam calls and texts? Follow these steps to help stop them.

by Cleoriff
on ‎02-08-2019 15:43
Nice guide @SamsungFanBoy. Very helpful Smiley Happy
by Poppysmum
on ‎02-08-2019 18:28

Good Guide Smiley Happy

by TallTrees
on ‎02-08-2019 20:20

Nice guide @SamsungFanBoy 

by jonsie
on ‎02-08-2019 20:43

Good guide @SamsungFanBoy 


If I could just suggest a footnote.


If you change your number because of nuisance or threatening calls, it is advisable to never associate your new number with any social media apps such as Facebook, Messenger etc. Any other social apps where a text is sent to your phone will already be registered with your old number. Changing your number won't affect those existing apps.

Also be very careful who you share the new number with.

by Community Manager
on ‎05-08-2019 15:34

Awesome guide @SamsungFanBoy ! Thanks for putting this together.

We've added this to the Guide Mentions, so when linking to it, you can just type # and "number" and it should easily come up! Smiley Happy

by SamsungFanBoy
on ‎03-09-2019 03:55
Sorry for the late response but thanks guys! I've been stupidly busy of late and haven't been on here as much!
by TallTrees
on ‎03-09-2019 07:58
Hi @SamsungFanBoy
No problem understood working.
Actually your guide is very helpful as quite a few distress posts have been put up just recently whereby o2 customers are receiving a huge amount of calls daily. To the point of distraction. I have just been reading it myself but hopefully won't need to take drastic action yet.
by jonsie
on ‎03-09-2019 23:18

The recent spate of spam/scam calls are apparently down to O2's filters and so we're actually hoping this is a quick fix and customers won't need to change number. I expect O2 will refund any charges due to their system failure.