Over the past month+ multiple iPhones running 11.2+ have had an myriad of issues with my 2.4Ghz network at home, and on my Verizon hot spot. The issues go away when I switch to 5Ghz on either environment. I have an iPhone 5S, 6S and 7 that all have the same issues. Often times the phones will refuse to auto-connect to my 2.4Ghz network. Sometimes I can turn wifi off/on and it will connect. Since 11.3, my iPhone 7 and 5S wont connect to the 2.4Ghz network. I reset network settings on both devices and attempt to re-connect but they just try to auto-connect over and over. What is strange I can enter a bad password and it will sit and attempt to auto connect over and over forever even though it was the wrong password. If I say forget network, it wont let me enter a new password the next time I attempt to connect until I do a network reset. I feel like this has got worse over the past month, and was probably introduced sometime in 11.2.x, but its still an issue in 11.3. If not more prevalent now that Im using 11.3 on all these devices. I have other devices (wireless cameras/water heater) that us 2.4Ghz in my home, and they operate just fine. Plus this same issue happens on my home router and my Verizon hot spot. So its an issue with iOS. Sorry if something similar was already posted.