Roaming most of the time in EU means you can rely on same costs for your phone as if you are at home. That really changes when you are outside this area. Too high costs for everything: incoming calls, outgoing and data are astronomic. World Sim puts a stop to that by (in my case) the E-Sim. Bought it a few days before going to Turkye and I am happy to say that I can make calls for a better price than a local Sim. Besides, a local Sim is not so easy to get and you have to leave your personal details with the seller. Then try to activate the Sim in a language you do not know. None of this with World (E-) Sim. I wanted to log in to see my balance after a few days abroad. That was a challenge as well, but chat"man" Matt S sorted me out in a few minutes and looking into my data confirmed, I am better off with my new E-Sim by World Sim. Thanks Matt! Thanks World Sim!