If you want to have unlimited Mobile Internet in almost every country right after landing, we recommend
Pangia.
With this link you will get 10% off their e-sim mobile plans. I used it already and had an awesome experience.
Just make sure your phone supports e-sims!
You can use it globally, wherever you are going. If you travel a lot and don't want the hassle of local SIM cards, it's the best solution.