Hi all! I am so frustrated. I bought a new Galaxy S5 Active (not refurbished) about 5 weeks ago. Ever since then, I have had issues with my home Xfinity/Comcast WiFi network. When I bought the phone, I did a transfer of data from my old phone and had issues with upgrading to the new software version. I used the ATT&T Transfer app and it hung for hours and I had to manually stop it. Weird. So, I took the phone to a Samsung Tech at Best Buy, and they were able to force the upgrade. I wonder if I should have done a Factory Reset from day one??? So it had initial problems, transferring data and upgrading. I use an Xfinity Arris TG862G. Anyway, we have a home Xfinity WiFi network. I guess the router is at least 2 years old, maybe older. Not always, but most of the time, my phone shows up as a very weak connection. In fact, when this all started, I noticed having my old phone on the network, I assumed was taking up too much bandwidth because when I shut it down, my new phone suddenly connected great! Then after that software upgrade, it continued great for a few weeks. Now, it is always strong and solid with WiFi out of our home, and works well on all WiFi networks except our home Xfinity network. We have about 5 other Apple devices that all connect well, at about 50-60 db (RSSI level), but my phone maintains about a 20 - 35 db connection strength. All other phones on the network are fine. Once in a while it connects great and jumps up to 50+, but most of the time, it has issues connecting, horrible performance and continues to drop the connection. I installed some WiFi tools, signal boosters that help a little. In addition to the weak connection and internet hanging all the time, I am not getting Authentication Error like every 20 minutes or so, and I have to reconnect. It keeps happening, and only on the home network. Why only my phone and my home WiFi router? Its an Arris unit. I have tried checking the Ghz setting but I think the modem/router is 2.4Ghz only. I have done Wireless router resets, unplugged it, restarted it, rest my Galaxy by removing batter and cards, manually connecting to the WiFi network, cleared cache, etc. I have NOT done a Factory Reset yet, and may do that tonight. Maybe I should have done that from day one?! But still, why only my home network? Another weird thing is that when I use Samsung Smart Switch on my laptop to backup my phone, the Smart Switch app is unable to recognize my phone! So, I can't back it up! Ugh! I bought the phone from Gadget Wizards online, new, and they have great customer service. They said I can return it, but it seems weird why this is isolated to my phone and Xifinity WiFi. Thoughts? Do a reset? Any setting I should check? WiFi hotspot setting? Funy when I read troubleshooting tips online, they point to menu settings that I do not have on my phone. Weird?! Thanks! I appreciate it!