can't call it's showing 'outgoing call barred. It's asking for a 4 digit pin, which I don't have?

[Anonymous]

I have tried 0000  1234  1111  No joy

[MI5]

0000 is the default O2 sim pin but it sounds like someone has turned on the setting to restrict outgoing calls on your handset which would require a different pin to be set as part of the process.
You need the pin off the person who set up the call restrictions.

[Anonymous]

Strange - had the phone and Sim from new, never had a problem to this number before and never set a PIN before!

[MI5]

The only other possibility is that you have an unpaid bill and O2 have blocked your calls?
Check in your MyO2 and call CS if necessary.
http://www.o2.co.uk/myo2
http://www.o2.co.uk/contactus

[jonsie]

Call barring is usually set up using pin 2 which is either 5555 or 6666 but if nothing has changed on the phone I would check no restriction has been put on calls by o2.

It may be an idea to get the sim swapped by your local O2 Store as a new sim would negate any restrictions put on the new sim via the phone security.

[Martin-O2]

Hey @Anonymous what happened with your issue? did you get the outgoing calls unblocked?