I am a diehard fan of the international SIM cards that RebelFone offers. These are the best option for global travelers, as they offer a lot of advantages to you. I learnt this through my own experience with RebelFone and another service provider I won’t name here.
I first heard about international SIM cards in general while researching connectivity solutions for my month long trip to the USA some months back. I got a USA SIM card from a so-called ‘international’ telecom service provider. However, the USA SIM card I got turned out to be really useless, in terms of providing me network coverage and clear signals. And it was very expensive to rent, and use too.