You can use MyFRITZ!App regardless of the IP protocol used. Even if you use the FRITZ!Box on an internet connection with Internet Protocol version 6 (IPv6) or DS-Lite ('Dual Stack Lite'), you can access the FRITZ!Box from the internet.

However, to access a FRITZ!Box, you must always use the same IP protocol used to connect the FRITZ!Box to the internet. If the FRITZ!Box is used on an internet connection with IPv6 or DS-Lite, it is only accessible via IPv6. In this case, you cannot use IPv4 to access the FRITZ!Box.

Since not all internet connections offer IPv6 connectivity (for example in some mobile networks and Wi-Fi hotspots), call up www.test-ipv6.com or www.ipv6-test.com on the respective smartphone or tablet to test IPv6 connectivity. You can only access the FRITZ!Box if IPv6 connectivity is available.

Example:
A smartphone use a mobile connection that does not support IPv6 connectivity. In this case, it cannot access the FRITZ!Box.
A tablet is being used on an IPv6 internet connection. You cannot access the FRITZ!Box.