well, most of the time MTNL CC is not reachable...even if u get connected, it's of not much help...Sify, u get connected and ppl talk to u...but u don't get the solution that u want...so CC wise, Sify has an upperhand...but service wise, it can't match MTNL...i know few ppl will say that they look for good CC support, but then wouldn't u rather have one where u don't need it only???