hi friends i was too facing the same problem its main solution is to update the phone software you can update your phone software using your pc download nokia pc suite then connect your phone through usb then go to File>update phone software it downloads the nokia software updater its about 50-55mb only then install it.
it checks your phone for software updates update your phone software through this!
CAUTIONo not remove or unplug your usb till the software downloads and installs on the phone....
me too facing this problem...i m very much disappointed by this phone..
This is sourabh grover and i purchased nokia c2-03 a day before tomorrow.There is no data in the phone even in the memory card.Every time i click on ovi store button and music button it gives an error message that memory needed delete some items want to know that there is no installed themes ,games etc in the phone just 10-15 SMS are there then where is my phone's memory use.Even when i call to customer care they told me to restore the phone then surely your problem will sought out..But it still there..CC also told me that go to nokia care adn FLSH your device once.So tell me after flashing the problem will sought out ... They also said format the memory card for virus.Now the one problem may arise that all data related to app by default given by nokia is all formatted.And now my some app are not working(default) like calculator and all..Please help me sir.I am very disappointed by NOKIA C2-03..2days before I purchased..