Guess what.16/01/09 - Friday - 11am - Called MTNL Call Center (1500), gave request to get my triband tariff plan changed to 256UL. As usual I asked how long it would take and they reply "at max a week sir". I tell them I need it faster if possible, give alternate contact details, take the request no etc and hangup.16/01/09 - Friday - 1:30 pm - I get a confirmation call from MTNL. Again I asked how long would it take and the standard reply "at max a week sir".17/01/09 - Saturday - 9:30 am - MTNL guys call at home. since I'm not around they check when I'll be back.17/01/09 - Saturday - 11 am - MTNL guys call and say "this is to inform you that your tariff plan change has been done" !!!I just couldn't believe this. "Plan change done in less than 24 hours ? Am I day dreaming ?" Checked the MTNL account info page etc all and found everything is in order. The plan change date says 16/01/09 in stead of 17th but I won't mind paying for 1 day extra for the quick response itself.What you say guys ? Should I write an appreciation letter (mail) to MTNL or let if go thinking this is one off case ? I think it's worth much more than the usual complaint mails that must be going across. Will wait for the current months billing and then send the mail if there's no further goof up.PS - Been having this kind of experience with MTNL for quite a while now on Dolphin - all requests there get handled in 2 working days at most.