The problem is with both samsung(need software update) and jio( it consider both s20fe 4g and 5g version as same model).Apparently samsung only gave update for n78 band, which is the reason some people get 5g after activating welcome offer using oth...

How? Did you activate it through some other 5g device and used it in your s20fe after receiving the offer ?

Ah okay, now that you receive 5g signal are you able to use unlimited 5g data? I mean it's not activated right?I have 5g network coverage but my s20fe dosent receive 5g signal but just LTE+ 

Did you activate your number using other 5g device?