I am having problems sending and receiving text messages and also phone calls too. Sometimes the text messages do send other times they say message not sent. It only then works when I turn my phone off which I shouldn't have to do. I Changed everything back to factory settings, doesn't work. The thing is Iv had this phone a year and worked fine no problems at all the first year and on the second year of the contract I started with the issues. Also I cannot always make calls and people often struggle to ring my phone. Samsung Galaxy Ace is the worse phone I've had this is really putting me off android/samsung phones in the future. I have also made sure the message centre number is right, as instructed on virgin media website when the problems occur, please help!!!