On third country (and sim) since purchase of phone. Prior two places no issues. PlugnPlay. Popped sims in and full functionality.
In third place bought new sim/call & data packages upon arrival. Got home after purchase and no connections. As primarily bought for tethering data immediately next day returned to provider store and they screwed around with APN settings (maybe?) and got data working.
It was not until a few days later when needing to make a call I realized functionality did not work, and thinking more about it, had not received a sms yet from carrier that sends many. Went to store again and they could not figure anything out.
Sim works when placed in other phones. Calls never make any connection with immediate drop.