AFAIK, the latest software for Airtel HD STB is ver. 452 for Homecast HD STB.
What make is your HD-STB having..Hoemcast, Huawei or anything else?
I have Homecast HD-DVR which has ver. 451.
You can try to update the software manually as follows:
- When TV and STB are ON, just switch off the STB from Main-Power (don't switch off the STB from Remote)
- Wait for 30 seconds and switch the STB power again...when the TV shows the message 'Please wait initializing', press 'EXIT' button twice followed by 2465 immediately..and then the software download message appears.
But I would recommend, better stay on the current version if the above method becomes unsuccessful. Airtel will someday automatically update the software version for your STB.
Also, if your STB still showing Satellite Insat-4CR, then call to customer care to get the Dish Alignment and Satellite changed to SES-7. And for this, they won't charge anything.