FRITZ!Box 7530 on a 100/50 MBit/s DSL line. 5GHz Wifi. Fritz!Phone app on iPhone for landline calls instead of a DECT handset. I'm the only user, with 6-8 WiFi

FRITZ!Box 7530 on a 100/50 MBit/s DSL line. 5GHz Wifi. Fritz!Phone app on iPhone for landline calls instead of a DECT handset. I'm the only user, with 6-8 WiFi devices, so bandwidth is not an issue. There's also a QNAP NAS and a gaming PC connected via LAN, everything else is WiFi only. I used to have a FRITZ! repeater as well, but in the new flat it's not necessary anymore.