I switched my iphone onto the xt network a day after launch day. Since then my iphone:

makes sms alerts but when i check the phone the network signal has dropped and come back but no sms! is that normal?

alot of network lost messages come up, but im in central wellington and christchurch with full reception!

woth receive texts sometimes, i have to text my self for them to flood in.

drops calls.

Is it the sim card or something? because it was fine on vodafone.