I am using the SE Xperia X1, which telecom says is compatible with the new Telecom XT network (a Telecom manager checked for me instore by checking the IMEI number) however my X1 is not picking up the signal when the SIM is inserted. The X1 only picks up 'vodafone NZ' and 'NZ comms'.

Is there a problem Telecom is having with non-Telecom sold handsets that should be able to work on the new XT network at the moment? Or do I need to change some settings on my X1? The settings are exactly how I left them which works fine when a Vodafone SIM is inserted and every setting is on auto.

I should mention my Telecom XT SIM is working fine when it is inserted into a Telecom sold handset such as the SE C510 so my number and account is fully switched.

Thanks