Went to Malaysia in April with my family and daddy decided to use Matrix sim card to save on international roaming charges. Obviously also because he could get it from his office and once in a while he could do check his office stuff as well... It worked good in terms of call connectivity and the network coverage was also good.. Solved our purpose of staying connected with a few family members and dad could do his work as well.. All in all the decision of using a Matrix sim was good!