10 August 2023

NEW: Make calls with FRITZ!Box 6850 5G/LTE via the SIM card

With the update to FRITZ!OS 7.56, a practical feature is added to FRITZ!Box 6850 5G and LTE: making calls via the phone number on the SIM card. Here's how:

With the update to FRITZ!OS 7.56, FRITZ!Box 6850 5G or LTE can make calls via the SIM card in a connected telephone. That was not possible previously and had to be set up by a different Voice Over IP provider. After the update, you can use the SIM card’s number to make calls with your FRITZ!Fon.

Do you already have a cell phone plan with high data capacity and a flat rate for calls? Then, if you add a MultiSIM to the rate plan, you can use the data capacity on your FRITZ!Box and make calls via the associated cell phone number with a connected telephone. When you use a MultiSIM, both the smartphone and the telephone on the FRITZ!Box will ring simultaneously for incoming calls. As an alternative, you can use a cell phone plan exclusively for FRITZ!Box.

This new feature provides greater convenience. At home you can make calls with a FRITZ!Fon while your smartphone charges. In your home office, use the cell phone number and enjoy ideal reception.

FRITZ!Box supports telephony in LTE and 5G networks

The requirement for telephony via the SIM card is that your plan includes Voice over LTE (VoLTE), which is standard for internet and data usage.

FRITZ!Box 6850 5G is equipped for making calls in 5G stand-alone networks. It also supports Voice over New Radio (VoNR or also known as Vo5G). This means that a terminal device does not have to switch to the LTE standard for a telephone call. The first providers in Europe have announced that they will soon offer Voice over New Radio in their networks.

Here’s how to set up telephony via SIM card.

Open your FRITZ!Box user interface and click on “Telephony > Your own number” in the menu. From the menu, select the “New number” option and then “Mobile number”. Enter your cell phone number (without country code) in the appropriate field and click on “Apply”.

... and you're ready to start making calls.