Until last month, I was very persistent on using my Indian number for whatever travels I undertook abroad until I was forced by my son to use a matrix sim card. I still wasn’t very sure of how an idea it was. Since he had got it arranged for me from his friend, I decided to give it a shot. Very honestly it wasn’t that bad using that matrix sim. Very smooth voice calls. What I was more concerned was with my emails, which worked absolutely fine throughout California. And honestly, their charges were half of what I have usually paid on my indian number there that too with poor connection. All in all, it wasn’t bad trying matrix Sims. Their services are way better than what I had expected. Glad to have used it.