Coming weeks again ?

they put notice board or just a paper ??

hi,
i have iphone 3gs bougt from Maxis with two year contract which the contract and warranty expired last month. My phone get reset several times with apple logo suddenly and cannot make incoming/outgoing calls. This has happen almost twice and i took it to Maxis center. They check and say it is perfect and nothing wrong with the set. But the phone again go to resetting today again after three days of my visit.
The customer care guy say that if i have same problem again, he can exchange me with new phone at a cost of rm 500. Is it worth exchanging the phone for 500 ringgit?, ( anyway it is already two years old phone and not JB)
what is the market price for 3gs 32gb model now? If they exchange me, is it new phone or any refurbished phone? how abt warranty for the phone? ( Is it not cover 2 years warranty considered it is a new phone as claim by maxis for replacement)

anybody have taken such exchange ? pls share