Being a business man I need to travel a lot and my international roaming bills are sky high always. I was looking for some good reputed international sim cards options and the only reputed company I heard a lot about matrix sim cards.! And recently , when i went to Thailand for work, I decided to use a matrix sim card and I was really surprised at the wonderful quality of network and also voice quality! They stood for everything that I read online about them! Thanks guys, it was wonderful using ur sim services