I first noticed this a few months ago where I did not receive a text message. I brushed it off thinking it was an issue with the other party. But this morning, I had a colleague ask me why I didn't respond to his text message, which was sent a few days earlier. I did not receive said text message. We tried a test this morning and I was able to receive two of his three text messages. He is with Bell Canada. My phone is the Galaxy s5. I have not installed or uninstalled any apps during the time period in which the problem started. I have never used an iphone. It makes me wonder how many text messages I have missed. I just inquired with another person and have missed a text message from him. I called koodo and they said that my sim card was dirty but if that's the case, wouldn't none text message get to me?