Just bought a iPhone 3GS and put my Tesco sim card in it. All my credit disappeared overnight even though I was on wi-fi and only made one call. Any advice please
I have just bought a refurbished iPhone 3GS and put my Tesco Sim card into it. It worked well and I made one call. However next day I notice that all my credit has gone £30 !) any ideas as to what is wrong please.
iPhone 3GS, iOS 4.3
