02-02-2013 12:00 AM
How can i upgrade my phone manually
What is you device present OS version, OS 4 – 5 = Options > About > first set of numbers on the third line.
02-03-2013 09:27 AM
Your device seems to running the most recent OS from your Carrier MTN Nigeria , If you are having any issues with your device OS then you can always perform a OS reload, if you want to do that then refer to this Knowledge Base :
KB03621 : How to Reload BlackBerry Device Software and application using BlackBerry Desktop Software