I am fed up of my (vodafone) K850i

i had it unlocked by ******** 13euros

and worked perfectly (on o2) for a month, then it crashed, would not turn on

so i got it flashed again, and now its exactly the same again

I can not kep spending money to get it flashed when it crashes


anyone know why this happens or if theres a way around the problem


other then sell the phone