8310 help

[badger]

I've just been given an 8310 v5.57. When I put my Vodaphone SIM in it allows me to send\receive text messages but when I dial out it wont connect and I get a call error tone. If I put a T-Mobile SIM in I cannot even send text messages. If I put an O2 SIM in it says SIM Card registration failed. Any ideas? Is the phone locked? If so why can I send\receive text messages with the Vodaphone SIM?
Thanks.

[sysop104]

Your phone is barred m8! sorry. Someone report that phone missing/stolen and it IMEI is barred on the networks! No inexpensive solution at the moment to change IMEI so try use another phone!

B.R.