Written on: 03/09/2013
I tried many roaming sim cards before. OneSimCard is by far the best. It is the best in terms of:
1. Connection quality
2. Lowest Costs
3. Most countries coverage
4. VOIP options
5. iPhone and Android app helping to make easy calls
6. Great Customer Support
The service requires you to sit down for 30 minutes and learn how to use it. If you are not ready to spend 30 minutes, then this service is not for you. OneSimCard offers bunch of simple short videos that help a lot to figure out how to call, send SMS and how to configure internet data on your phone.
It is a callback service. This means that you dial the number and then in few seconds your phone rings and once you answer the ring, you will get connected. This is hardly an inconvenience. There are iPhone and Android phone free apps from OneSimCard that remove the callback effect.
Overall - this is the best roaming SIM I tried.