Sim

[Anon]

Do I need to leave my old sim in phone to change number?

[dalyer · Accepted solution]

Yes - you need to be able to receive the security code to your old number/SIM in order to submit a number porting request:

http://48months.ie/portin

If you can't do that (e.g. your old SIM is disabled or whatever) then you'll have to log a support request asking 48 if they can manually port your number over:

http://help.48months.ie/requests/new

Hope this helps.