dun know if nokia 2600 has any probs or not.....but let me brief in some samsung c100 probs that i face sometimes:
Low battery life
no downloadin java games if on Hutch Gprs (Mumbai)
Hangs out while recharging somtimes (Must remove the battery and place it back again)
no .jpg and .mid support for pic and poly tones rather .gif .abm and .mmf support which are kinda tough to find than usual tones and pics download as nokia's common support.
besides this its a great and sleek Basic Gprs Phone.....where the nokia 2600 lacks out is the 65k screen and the Gprs and Wap connectivity....
Also i guess they are somewhat costin almost the same
So samung c100 Vote here too 8)
@hikapil.....dude 2600 has full polyphonic mid format ringtones support
but low volume compared to samsung c100