Hi,

Ever since upgraded to iPhone4, I frequently experience network fault like can't make a call or txt however I can receive txt but pxt.

However bars on the signal usually on 1~3.

Only solution I found is that switch to Airplane mode and back to normal to re-join network, then everything gets normal again.

I just wondering should I ask for warranty for fix or should I call Vodafone for test?

Cheers

Shin