I've been reporting spammers since 2005, since DND rules came into place.
Only in the last year have I seen the spam slow down. Earlier operators would dismiss the complaint saying to it was a "transactional communication," now it's logged with TRAI and the operator and they have less room to manipulate the complaint.
Simply installing Sanchar Sathi won’t eliminate spam calls, which was my point.
The TRAI DND app, on IOS, generates a pre-formatted SMS which is sent to the operator on the standard number 1909.
The Sanchar Sathi app sends it to a DOT entity which then routes it to the operator while updating the govt database of reported spammers and scammers. The options are much extensive than just a spam call/sms.
You can report that the individual was impersonating a public official etc while you can not do than at all with the TRAI DND app.
I suggest you try out the platform on their website first before commenting further.