I'm a photo journalist and I travel a lot which makes calling from abroad really expensive. On my recent trip to Bali i used a matrix global sim card and was by far the cheapest that I have used so far. I mean cards locally are also cheap but their internet speed is really bad, which makes it difficult for me to use. With matrix sims uploading my work was a lot faster and simpler. !! Recommending this o=to all my photographer friends!!