I live in Lithuania, and here you can get unlimited LTE for €19.90/month from Telia. It's designed to be used at home for those who can't get fibre optic intern

I live in Lithuania, and here you can get unlimited LTE for €19.90/month from Telia. It's designed to be used at home for those who can't get fibre optic internet, but I guess it would work fine in a phone too.