I used to do 120G/month when I had a limit that high, in Poland, for around 8$/month (I was able to use 2G and 3G and everything in between, too, but most of the time I was on 4G)

1 GB data is like four 720px 8 minute YouTube videos.

Just watch 5-6 Youtube videos on a decent phone (1080p or 1440p) and you're done.