Computer v. phone data

[king1]

So your best bet here is to probably figure out the WIFI on the modem, and the save yourself the need for upgrading the phone plan...

Sticker with wifi code is on the bottom of modem usually,
it is always CasE sensitive,
Sometimes, there is a wifi switch on the modem that folks inadvertently turn off and hence no WIFI

If you let us know the model of the modem we can look it up and maybe throw a few pointer your way...