Get free internet

Solution
You cannot connect to internet without connection to internet.
Said connection is pretty much always provided by modem or router/modem combo. Said device (modem) communicates with the ISP to give the access.
Said connection to ISP costs money.

You could, in theory, use wifi extender or something similar and piggyback on your neighbours wifi but... that is kind of wrong thing to do, especially if you have not agreed on it with said neighbour first. (and you would need neighbours wifi password for that to work too)

in short.. not really feasible.

Edit: if your phone's data plan allows for it, you could in theory use that too, but at least in US they kind of heavily limit data amounts. (and data costs a fortune anyway)
You cannot connect to internet without connection to internet.
Said connection is pretty much always provided by modem or router/modem combo. Said device (modem) communicates with the ISP to give the access.
Said connection to ISP costs money.

You could, in theory, use wifi extender or something similar and piggyback on your neighbours wifi but... that is kind of wrong thing to do, especially if you have not agreed on it with said neighbour first. (and you would need neighbours wifi password for that to work too)

in short.. not really feasible.

Edit: if your phone's data plan allows for it, you could in theory use that too, but at least in US they kind of heavily limit data amounts. (and data costs a fortune anyway)
 
Solution