Airtel launched the first LTE network in India and other operators like Reliance Infotel, Aircel and Tikona are going to follow this trend soon.
Nokia Lumia 900, HTC Thunderbolt, Apple's New iPad and Samsung Galaxy Nexus are supporting 4G but it is of different kind named as FD-LTE, while Indian operators are deploying a TD-LTE network. That is why Nokia is reluctant in launching 4G variant of Lumia 900 in India.
As there is one commercial network in India due to which devices for TD-LTE networks are not available. China Mobile is also implementing a huge TD-LTE network in China; it is still in the nascent phase. Sprint, USA-based operator has also announced plans to deploy a TD-LTE network which is likely to boost the availability of TD-LTE devices.
Companies like Qualcomm and Mediatek, are also coming up with designs based on TD-LTE.
Now the consumers who are accessing Airtel's 4G network will only be able to use dongles for high speed wireless network. Reliance Infotel with nationwide BWA license is expected to launch its network by October. They are also going to launch tablets with TD-LTE support.
Till then people will have to be satisfied with WiFi hotspot dongles and standalone data cards for LTE networks in India.

Source: Themobileindian