i use the mts dongle at lb shashtry nagar, old airport road.
initially was on the 10gb/999 prepaid plan. On prepaid the speed was awesome and got more than 2mbps most of time. have traveled to madurai and even tuticorin the speeds were great.
2 months back, converted to post paid 40gb plan and since then the speed has been pathetic. i am not sure what is wrong here, but seems when we connect the dongle, and change dns to google dns, it works great, but on mts mblaze wifi where we are not able to change the dns, speeds are pathetic. took to the marathalli mts store, even there we are getting less than 0.50mbps on speedtest