I am currently in France, and before I left Canada, I added the txt15 to my plan (I'm on an iPhone 5C). I have been in a couple different countries, and have had issues with receiving texts. When I was in Iceland, I was able to receive texts, and eventually, was able to send them (after switching to a different network). When I went to the UK, I was still able to receive texts, but no matter which network I was on, I wasn't able to send anything out. I was only there for 2 days, so I wasn't too concerned. Now, I'm going to be in France and Spain for the next 1.5 weeks, and I still can't figure it out. In France, I've been able to receive a message, but anything I try to send won't go through and I get a "not delivered" message back. I've tried joining all the different networks available, and I still haven't figured it out.