Can put Yes FT5G Prepaid Plan simcard into 5g ROUTER and use as unlimited data?

I was using YES broadband Flexi 58, quite ok, but when moving around, the line can't connected quickily ( i used it in 5g Phone)

then i changed to XOX postpaid unlimited, worst. At home also will switch to EDGE, very frequently, and always can't switch back to 5G automatically.

Now thinking to sign the umobile free modem 2 years contract.