I am paying the $100 max with AT&T while in England for a few months. It seemed easier to me because I can keep my US number. The alternative of getting a UK eSim and dropping my AT&T plan to just calls and texts, is not that desirable because I actually use the HBO Max that comes with my higher-tier AT&T plan. So if I were to pay for HBO Max, then the difference would come out to like $30/month, which just doesn’t seem that handy to me. If I were travelling for only 1-2 weeks, that would be different…

Am I making a mistake here?