One of the most reliable sim cards that I have used recently. I was traveling across China for work and after my last experience of using their local sim card, ii had decided to get myself one from India before I even flew out. This time I used a matrix sim card. It was such a relief on the communication bit especially when I had to call the support team when my emails stopped working. Last time I dreaded to connecting on the support team, since language was such a big barrier. Matrix Sims for me, were pure convenience in a truly foreign land.