How do I update the OS on my device?
can any one tell me how to upgrade Samsung galaxy i5510 2.2 froyo to 2.3 Gingerbread
I have done this on my Samsung Galaxy I5510, just follow these steps:
Required: phone's USB driver should be installed
For more information, go to this link.
Well, and a bunch more, e.g. for India and other things. Due to missing details in your question, this could become a rather long list -- which is not much loved here, so I'd better stop at this place. Hopefully, one of the above links works out for you -- otherwise, please re-formulate your question as suggested :)