How to enable LTE in Lumia 820?

[Rajanmitta]

I am unable to get LTE option in data option in settings in my Lumia 820. Please suggest how I can enable it..

 

[Gokul Rajan]

I am unable to get LTE option in data option in settings in my Lumia 820. Please suggest how I can enable it..

open your phone dial ##3282#[this is field test mode] you can check your phone supporting 4g bands and enable LTE

 

[Rajanmitta]

Now working

The action is incomplete with ##3282#.
Is it valid code?
Also how to enable then LTE?

 

[Hartower]

For my Lumia 820 with Windows 8.1 seems to work as it follows:
1. Go to "Settings" and then look for "Network Selection"
2. Select "automatic" from available network (do select again eventhough if you already have it as "automatic" initially)
This reverted me back to the Data connection to highest available network like E or 3G or 4G. But for me it doesn´t last too long as I could't try it in a 4G area.

Solution found in WindowsCentral by jagadeshkv. I'm too new to post links.