I have two D385 with sipgate. Both of them are extremely lagging in daily use. Sometimes when I want to enter a number via the buttons, it can take up to 30 seconds until the display begins to show the numbers. When I receive a call it happens quite often, that even picking up physically takes the phone so long to react, that the call is gone.
FW is the actual 10.1.137.15. WLAN Dongle is in use. Tried a complete reset and new configuration two times already with no effect.