Why does the Bluetooth symbol disappear temporarily when connected to my mobile phone?

The Bluetooth icon on the display of the Gigaset SX3X3isdn indicates an existing Bluetooth connection. If this icon is temporarily not displayed, the reason for this may be: the mobile is outside the Bluetooth range, the battery capacity of the mobile phone is too low and/or the firmware version of the Gigaset.

In the last case, please carry out a firmware upgrade of your Gigaset.