Phone software with many malfunctions

The name is in the Nokia 6220 Classic misleading: On the complete plastic processing nothing is classic to recognize. The performance, however, are quite right:
UMTS phone
Band type: Quadband
2.20 "display
Resolution: 240 pixels x 320 pixels - 16 million colors
Camera - 5 megapixel effective
Camera resolution: 2,560 pixels x 1,920 pixels - 20x digital zoom
Multimedia Player
Organizer with calendar, address book and notes detailed
Reader for Office documents
Bluetooth and USB connection cable

Battery performance depends on the environment. As O2 customer with extremely to poor power distribution and connection quality of the battery is quickly empty with me - but with other wireless service providers or better reception, the battery should have a normal life.

However, the functions of the mobile phone are for some time for no apparent reason faulty: First only the calendar was not called, then I no longer have access to my contacts. Here only helped setup the operating software (which I got lost all contact with no way to get backups). After a short time faultless functioning set back from the calendar function. Now this I have no access to the call lists.

I assume that my device is faulty from the factory - and most devices are delivered fully functional. But a bad review for so many mistakes there's anyway.