I have the old 590NU MTNL Triband plan and am thinking of switching over to 849NU plan temporarily, just for around the rest of the month. Will be migrating to 200P plan after that.Roughly how long will it takes for the MTNL guys to change my triband connection once the application has been submitted by me.Is the 849NU plan good. I mean do you actually get around 2Mbps speed between 12-8 am night. Asking this because the quoted speed on the MTNL Triband site for this plan is 256Kbps to 2Mbps.Do they impose any extra charges just for changing the plan.On my current plan I have used up around 850mb out of the allowed 1024mb. If I apply now and they change my plan immediately to 849NU how will I get the current month's bill in the next month. Does anybody know how it will be calculated.