ht19090701 FritzBox 7490 wlan problem [fix]

FritzBox 7490 WLAN problem

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.


  • Lose of WLAN WiFi signal
  • Broken WLAN signal
  • YouTube is loading not or only a few seconds and then stops loading, showing spinning wheel
  • Somethings it works sometimes not



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.

(a) Re-route WLAN antenna wire within your FritzBox 7490

Before (with WLAN problem):

After (fixed WLAN problem):

  • Move antenna calbes away from USB ports problem zones.


(b) Maybe also use just USB 2.0 instead of USB 3.0 within your router settings


(c) Put your router device on a top location within your room

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.


Links - Wireless or DECT connections are subject to interference when a USB 3.0 device is connected


  • VDSL or ADSL line
  • All-IP, analog or ISDN landline
  • 4 x gigabit Ethernet, WAN via LAN 1 port
  • Wireless AC with up to 1300 Mbit/s
  • Wireless N with up to 450 Mbit/s
  • 2 USB 3.0 ports for printers and storage media
  • DECT base station for up to six handsets
  • ISDN S₀ bus for ISDN telephones or ISDN telephone system
  • 2 a/b ports for analog telephones, answering machines and fax



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