Can I get truly free 4G data for my phone

[AC Question]

hi my name is Cruz Alvarez and I've had a smartphone for a number of years now how much time for the T-Mobile has been good to me however it is prepaid so that may be a good thing however when it comes to deals they don't offer much I'm on the 50 dollar a month 5 gigabyte plan which to be fair is a good plan but at times not so much and better plans are expensive for example I could upgrade to 7 gigabytes for $65 but that is expensive when your on limited income and I have hide a lot of YouTube videos vet off of what they call a hundred percent free data on the video title and it never works so that's why I'm on Android Central asking for help with this