We are facing unusual problem since few days. On Airtel 4G network, google.com, as an example, opens only in Chrome but not in IE or Firefox. But thru Tata Photon 2G, the same site opens from all the three browsers. This problem started after we changed the hardware device from Airtel. We had an indoor device earlier for more than 1.6 yrs which is now replaced by an outdoor device(ODU). Also the 4G sim card is new. Have officially lodged a complaint with Airtel. The Airtel guys' first clarification is "no issues from their end". Has anybody faced similar problem? Or do you have any logical / technical suggestion? Any suggestion or/and help is most welcome !!!