security code
 

hi i brought a 3510i in shop in lanzarote canary islands its ok with my spanish sim but when i put my old english sim in it asks 4 security code.the book says 12345 but this dont work took it to shop but he says i must have changed it and he cant do anything?i know i didnt change it+first time i charged it,only took an hour im sure there supposed to take a long time to charge first time an anyone help.hope somone can help