Rain 4G on 5G router

[gimpex]

Hey quick question please.
A mate of mine is literally on the border of 4G and 5G , looking at the rain coverage map. If he gets the 5G router ( current special R470 for 3 months ) and the 5G doesnt work , will the router automatically default and pick up 4G ?

 

[rain_mobile]

Hi @gimpex

could you send me a Private message with your mates address let me have a look first and advise you accordingly.