AVM FRITZ!Box 6850 5G (Mobilfunk-Internet bis zu 1.300 MBit/s, WLAN AC+N bis 866 MBit/s (5 GHz) & 400 MBit/s (2,4 GHz), 4 x Gigabit-LAN, DECT-Basis, USB 3.0, geeignet für Deutschland)
Anleitung: 5-GHz-Band der Fritzbox abschalten - TECHBOOK
The FritzBox router alternative from TP-Link with WiFi 6 in the Amazon offer rocks the network - Royals Blue
Aussetzer im 5-GHz-Band - WLAN, WiFi & Bluetooth - computerwoche.de
FRITZ!Box on Twitter: "@jiribrejcha You do have the option to disable 2.4 GHz. Go to Wireless > Radionetwork and uncheck the box 2.4 GHz. You can also adjust radio channel settings at