Well at this point we are not even aware if Lumia 920 gonna support LTE in India. There are many factors which is leaving consumers, operators and device manufacturers in imbroglio.
1. The operation frequency assigned for LTE in India is 2300 MHz. None of the Nokia models so far support this frequency.
2. So far Airtel is the only operator who launched LTE services in India that too for data only
3. Airtel is using Chinese developed technology TD (Time Divided) instead of the rest of the world (US and Europe) where they are using FD (Frequency Divided) Modes.
4. So far 3G technologies deployed in India are FD based and now Airtel LTE is in TD mode, so the devices to be designed need to have special radio chips to operate on two different patterns.
5. Huawei designed a phone which uses LTE on TD and 3G on FD for Airtel, but this is a complicated technological aspect and needs lot of testing as the mobile has to switch networks for each as an independent operation. Probably the users may not have data connection while on the phone
6. None of the other network operators have announced/detailed their LTE launch plans. Vodafone may provide FD mode in line with their global networks in Europe.
7. Well 3.5 G or HSDPA+ itself is still in nascent stage in India. Probably it may take another two years to expect LTE in major cities and may be even more with none of the current operators even mentioning about it.
Basically for this phone I'm not even bothered about LTE. As long as it works well on HSDPA, I'm okay with it. In fact Nokia started selling 3G phones well before the networks were upgraded. Probably the future Lumia two years from now is something when I would look for LTE compatibility...