I have tried several things on the Androidcentral forum to no avail. My last software update was on 4/20. It's current. The last few days my Galaxy S7 will not stay connected to my 2.4GHz wifi band. It will only stay connected to the 5.0 GHz wifi band. I have no new apps installed. I tried safe mode, no difference. I have had the wifi router for 1 and a half years and I run two other phones on it (Moto Z Play and iPhone). The other two phones are working just fine and choose the 2.4 GHz wifi band as usual. I have tried all kinds of reboots on the router and phone, tried changing channels on the router. Nothing is making a bit of difference on this phone. Anybody experienced this phenomenon?