Well, could be wireless issues, but I'm not sure if this is typical symptoms. A lot of people (numerically, not percentage-wise) have strange problems with particular APs. You see, the N8x0 uses some corners of the 802.11 standard related to powersaving that basically no Windows WLAN drivers use, even on laptops. While it's great when it works, and it works with most APs, there are a surprising number that don't work, apparently due to not testing those details that "nobody" uses. If this is the case, options in this case include updating firmware (if the manufacturer has fixed it) or switching to another brand of router. There's one other option, but it is havoc on batteries; try it to see if this is the trouble, but if this is the problem, you'd probably better try other measures. To try it, disconnect from the network, hit the WiFi icon -> Connectivity settings -> Connections -> your connection -> Edit -> Next-> Next-> Advanced-> Other, and select a different Power saving value. Try turning it Off, then see if things improve... If you see a substantial improvement, you can then try setting it back to On (intermediate), and see if that still works. From a clean flash, I don't know why you're having so much trouble. It sounds from your description like SW troubles, but your software should be essentially identical in this respect. So if it's not hardware trouble, I'm stumped. Best of luck!