I bought a new phone and restored my L9 to factory settings with my SIM card still in and empty 4GB micro SD (if the presence of those two matters). I didn't use it for a few days and the battery died. I had it charging for over a day and now it won't even turn on. I've tried charging with different cables different plugs. Whether I plug it into my PC or Mac there is no recognition of it. I've also tried doing the hard reboot (holding down volume down, home, power buttons). Any ideas?