FRITZ!App Fon Service - Knowledge Base

FRITZ!App Fon Service
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Setting up FRITZ!App Fon

FRITZ!App Fon allows you to conveniently make telephone calls over the FRITZ!Box with your smartphone when you are at home - the smartphone functions as an IP telephone. You can also use FRITZ!App Fon with several FRITZ!Boxes; this means that you make calls over different FRITZ!Boxes, depending on your location. To do so, you have to register FRITZ!App Fon once with each FRITZ!Box as described here. Once it is registered, you can also make calls over a VPN connection. Besides making calls from home, you can then also make calls over the FRITZ!Box no matter where you are.

Requirements / Restrictions

  • Android 4.0 or later is installed on the Android device and FRITZ!OS 6.10 or later is installed on the FRITZ!Box.
  • iOS 10.0 or later is installed on the iOS device and FRITZ!OS 7 or later is installed on the FRITZ!Box.
  • FRITZ!App Fon cannot be registered or used over the wireless guest access.
  • Various FRITZ!Box functions cannot be used with FRITZ!App Fon. These include call transfer, busy on busy, call-back on busy / no response, do not disturb function for individual numbers, the ability to control certain FRITZ!Box functions such as enabling or disabling wireless LAN, loading factory settings, or setting up call diversions.

1 Configuring the FRITZ!Box to allow access for applications

In the factory settings, the FRITZ!Box is configured to allow applications to access it. If you changed the FRITZ!Box's settings, configure it to allow applications to access it again:

  1. Click "Home Network" in the FRITZ!Box user interface.
  2. Click "Network" or "Home Network Overview" in the "Home Network" menu.
  3. Click on the "Network Settings" tab.
  4. Enable the option "Allow access for applications" in the "Access Settings in the Home Network" section. If the section is not displayed, enable the Advanced View.
  5. Click "Apply" to save the settings.

2 Setting up a wireless connection to the FRITZ!Box

When setting up the app, the smartphone or tablet must be connected with the FRITZ!Box's wireless network (not the guest network):

  1. Set up the wireless connection to the FRITZ!Box.

3 Installing FRITZ!App Fon

  1. Download FRITZ!App Fon from the Google Play Store or the Apple App Store and install the app on your smartphone.
  2. Start FRITZ!App Fon.
  3. If you set a password for the FRITZ!Box user interface, enter the password.
    • If you enabled "login with FRITZ!Box user name and password", enter the user name and password. The user must be authorized to use FRITZ!App Fon. You can edit the access rights of users under "System > FRITZ!Box Users" in the user interface.
  4. Confirm that the procedure may be executed on the FRITZ!Box, if asked to do so.

FRITZ!App Fon is now automatically configured as an IP telephone on the "LAN/WLAN" port in the FRITZ!Box.

4 Assigning telephone numbers

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Telephony Devices" in the "Telephony" menu.
  3. Click the (Edit) button for FRITZ!App Fon. When it was installed, FRITZ!App Fon was automatically set up with the telephone's device name on the "LAN/WLAN" port in the FRITZ!Box.
  4. From the drop-down list "Outgoing Calls", select the number that FRITZ!App Fon should use for making calls.
  5. Specify which numbers FRITZ!App Fon should react to when you receive calls.
  6. Click "OK" to save the settings.

5 Enabling calls to international and premium numbers

After setting up telephony, you can only make national calls and calls to emergency numbers. You can disable this security feature:

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Telephone Numbers" in the "Telephony" menu.
  3. Click on the "Line Settings" tab.
  4. Click on "Change selection" in the "Security" section.
  5. Uncheck the boxes for all of the IP telephones that are allowed to dial international and premium numbers.
  6. Click "OK" to save the settings and on the FRITZ!Box, confirm that the procedure may be executed if asked to do so.

6 Configuring FRITZ!App Fon for VPN

If you set up the VPN connection in Android or iOS, you must configure the following settings in FRITZ!App Fon so you you can make calls over the VPN connection:

Configuring FRITZ!App Fon for iOS

  1. Start FRITZ!App Fon.
  2. Tap "More" and then "Settings".
  3. Tap "Select FRITZ!Box".
  4. Tap "Enter the IP address manually".
  5. Instead of entering fritz.box, enter the local IP address of the FRITZ!Box (192.168.178.1 in the factory settings).

Configuring FRITZ!App Fon for Android

If you are using Android 5 ("Lollipop") or higher, you can use FRITZ!App Fon over a VPN connection without having to configure any settings first. The following settings are necessary in Android 4.4:

  1. Start FRITZ!App Fon.
  2. Tap "More" and then "Settings".
  3. Tap the menu key and then "Advanced".
  4. Enable the option "In all networks - Connect to FRITZ!Box even if WLAN is not connected".

7 Selecting a telephone book

With FRITZ!App Fon you can access the local contacts on your telephone and all of the FRITZ!Box telephone books, regardless of whether the telephone books are saved in the FRITZ!Box or you are using a telephone book of an email account:

Allowing access to contacts in iOS

In order for FRITZ!App Fon to access the local contacts on your iOS device under iOS, you must allow FRITZ!App Fon access to your contacts:

  1. Open the iOS settings.
  2. Tap "Privacy" and then "Contacts".
  3. Allow FRITZ!App Fon access to the contacts.

Switching telephone books

  1. Start FRITZ!App Fon.
  2. Tap "Phone book".
  3. In iOS, tap "Switch To"; in Android, tap the menu key and then "Select telephone book".
  4. Tap the telephone book you want to use with FRITZ!App Fon. "Phone contacts" or "iPhone contacts" are the local contacts on your telephone. The names displayed for the FRITZ!Box telephone books are the names you gave them in the FRITZ!Box user interface.

When you start FRITZ!App Fon now, FRITZ!App Fon automatically connects to the FRITZ!Box and remains active in the background. This way you can make calls quickly and directly over the FRITZ!Box. If you also use other telephony apps (such as Joyn) on your smartphone, you must always start FRITZ!App Fon before you start the other telephony apps because otherwise automatic registration with the FRITZ!Box may fail. If necessary, you can also completely close FRITZ!App Fon in Android. FRITZ!App Fon is always open in iOS.

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