I can understand maybe inside, but when I'm outside, there is only air and the wood door separating the sesame and my phone. 10-15 feet is the best it does. There are electronic devices above the sesame on the 2nd floor, probably 20 feet away. I have a Galaxy S6 on Android 6.0.1
I have a feeling I need to replace the battery. While it shows a charge, I think its weak. I had an issue earlier where the lock would not cycle fully after a few turns. Seems ok now, but still seems to struggle a bit at times, and my deadbolt is as loose as a goose, so its not that.