Earlier I had bad experience with airtel 4g dongle, I called up the representatives and said them the problem that its catching 3g-2g signal and speed is bad though its showing 4g. after many calls once a technician comes to re check the configuration and settings.
He did some settings and it was the same, finally I sold the dongle and transferred the ownership of it. Recently after seeing the TV ad the challenge thing, I thought to give a try on the 4g sim for my mobile, if it works fine will buy a 4g Dongle but no, it was pathetic speed.
Charges are of 4g and speed of 3g. Reminder: I am from bangalore, I reside in a well developed and populated area(Kormangala 6th block) which is in core city. customer care says no coverage in extension area or outskirts. tell the customer care to open google map and find the location, from which angle its a outskirt area? DDot get fooled, 4g will take another 1.5 years to develop.