Hi Guys,

This is coz the simcard slot is loose, so sometimes when u bring your iphone here and there (slight bumps)it tends to lose connection with the pins and causes the phone to ask for password.

I had the same problem and got fedup so I took out my sim card then I took a thick piece of paper from magazine and cut same size with the sim card and insert the simcard as well as the paper together and wallla.. No more asking for password ^^ Hope it helps..