I have a Nokia 7110. It's showing "contact service" for past few weeks. If I take out the SIM, it says "Insert SIM" for couple of seconds, and then switches off, only to come back on its own with a "contact service" display. As I gathered from web-sites, the firmware needs to be reloaded to solve the problem.

I had abt 250 entries in my phone adress book (not in SIM). And they are pretty important. My query is that, would I loose data if the firmware is reloaded (I don't have any other option of course, but in such case, I'd beter discard the phone and go for a new one). If yes, is there any way to save the data? or it's already lost?