A way for saving internet data and use it again ?!?

[raspyquilt204]

Hi, I got internet connection only at home as wireless (WIFI), and no mobile data outside home, cus its expensive to use them, so i got an idea if there's a way of download a data it self and save it somehow on phone for example only 1 GB and use what i saved at home from home in the street when i need it.
it would be a great way to save money and stay connected everywhere.
I was thinking if that idea is possible or to make an App for such purpose, Answer me and share ur thoughts about that and thanks

[Fatefinger]

What you are asking cannot be done.