I would strongly recommend against using Telestial. Not only is the price outrageous compared with locally purchased SIM cards, but the customer service is mediocre. We bought a card last year to use at the winter olympics After burning through the starter card, we attempted to "reload" the card with more money via telephone and internet. It took 96 hours to get the additional minutes added to the card, and there was no live customer service during this period (telephone or email). By the time someone responded, we had already purchased another SIM card locally which was activated immediately.