Hi. I won't have a phone service when I land at SJJ. I will immediately taxi to the bus terminal to get on the next bus to Mostar. I will have to call my pansion in Mostar to let them know which bus I get on. Is there somewhere I can buy a SIM card at SJJ or bus station, or is there free wifi at either? This would be extremely helpful for me to know before I land. Thanks!