I have a Resmed 10. It always showed all wifi bars lit up. At least a month ago I noticed only 2 bars barely lit. My Dr was questioning my use,which confused me. As suggested I was using it at night and for daytime naps. When I checked the app it only registered one session,for each day. I'm now using it right next to the gateway & its no better. I'm bringing it to my next check in to see if it can be either recalibrated or replaced. I wish we were notified of known issues.