@Baskar 

Hi, the MR600 doesn't support mobile 5G in hardware, so software update will not be able to add supports of mobile 5G.

If you would like a 5G product, you could consider Deco X80-5G, please note that the availability would be different in different areas.

For more information about it, you could also refer to the following post:

https://community.tp-link.com/en/home/forum/topic/567312