I have recently received a new Samsung Z500, from a friend, which used to be on a Vodaphone contract which has now ran out. The new phone has replaced my Samsung E720 which is from Orange. I have taken the SIM out of my E720 and placed it into my Z500. But, strangely, I am unable to send text messages. I have browsed through the phone setup but with no avail. So are there any network settings for example I may need to change to allow the crossover from the Orange to the Vodaphone phone?