Showing results for 
Search instead for 
Do you mean 
Our staff are currently offline, but you can use the community 24/7
Remember to accept a reply to your question as the answer!

Old O2 SIM not working


Hi guys,


I have an O2 number for 10-15 years.   I moved abroad 5 years ago but returned to Ireland for business.

However, for the last year or so I hadn't used the SIM because my work changed.  I am now planning a return to Ireland and I inserted the SIM today to top-up.  Top-up failed twice (2 x 10 euro) saying the number was invalid. The money was taken off the account!!


I checked the SIM in the phone and it looks like I can't connect to any network while roaming here.


Can you please look into it?  I need my old number and I need to know where the 20 euro went.




Re: Old O2 SIM not working

3 Staff

Hi Neil 👋 It sounds like you SIM has been deactivated due to in activity.  Can you PM me your full name, number, address and date of birth so I can access your account and look into this for you? Martin. 

Re: Old O2 SIM not working


Hi Martin,


I have a similar issue. My number has been inactive for 2.5 years while working abroad. I still have the old O2 sim and would like to keep old number?


Re: Old O2 SIM not working

3 Moderator

Hi @ciaran087, can you PM your details please and I'll check if the SIM is activate?

If you haven't already registered, now is a good time to do so.

Click here to see a guide on getting started.

Register now >>