USB 3.0, USB 2.0, FritzBox 7490, WLAN, WiFi, bad, signal, weak
WLAN schwach, WLAN Problem, WiFi Singal schwach, WLAN bricht ab, wlan Abbruch.
FritzBox OS version: 07.12 (or basically any version), Firmware version:113.07.12.
NOTE: There is NO external hard drive via USB connected. Just a printer via USB 2.0. Or offline and disconnected. The WLAN problem still persists also with disconnected USB devices. The only solution was to re-route the antenna cables within the router, at least in this case.
Before (with WLAN problem):
After (fixed WLAN problem):
Place your router NOT to the ground floor. Maybe locate it, hand it on a wall etc. Make sure the device get good air flow for cooling.
https://en.avm.de/service/fritzbox/fritzbox-7490/knowledge-base/publication/show/1636_Wireless-or-DECT-connections-are-subject-to-interference-when-a-USB-3-0-device-is-connected/ - Wireless or DECT connections are subject to interference when a USB 3.0 device is connected
https://en.avm.de/products/fritzbox/fritzbox-7490/
https://en.avm.de/service/fritzbox/fritzbox-7490/overview/
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