Hi cyrux, the 6600 is too old, too bulky & too slow.
The 3230 is a great "best buy" candidate. And it has only as many problems as any other OS-phone would (just like
windows CAN cause lot of problems, but those who maintain it well have no troubles).
Netfreak, the 3230 would work fine in the US+India, and just about everywhere in GSM areas - because its a tri-band phone -
LINK