Originally Posted by
doxa sub750T FWIW, I never had to change the setting and was able to connect to Aritel or IDEA (mostly Airtel) while in Chennai and Mumbai with 4G indication showing for network connection. It took a long while though until my PP was able to get a stable connection with 4G on Airtel. As soon as I arrived at Ana International airport in Chennai, IDEA was only signal my PP could connect to and it was on EDGE the whole time.
As soon as I arrived my hotel in about an hour later, it connected to 4G on Airtel. I know that there is no real 4G in India on Airtel and perhaps speed was close enough to H+. With TMO sim, it just read 4G. The interesting part is that my colleague iPhone 5 on TMO read 3G.