My mob8le Samsung 7562, purchased on 07/05/2013, I used phone for 1 month on Vodafone sim, then suddenly my phone had stopped working on Vodafone sim, I had change my sim thought that prob.is in sim, but new Vodafone sim is also not working, l hd given it in services centre but they said that prob. Is in motherboard, and they changed d motherboard also, but then also d Vodafone sim is not working so I request to d management that pkz issue me a new phone as I m fad up of all these