@idntknw,
Well your question isn't much clearer even now.
You can use the same hardware you use at home in Wi-Fi hotspots but it sounds like you are talking about laptop cellular cards. You'd need service (and the card) from your mobile provider for that.
Can you explain with more detail? It could be something else entirely and I'm not completely sure what you are getting at.
Do you want internet anywhere? Like cellphone service?
Do you want to know how to connect to a hotspot in a hotel, airport or Starbucks?
I'm not sure what you are going for.