if I make a call to my /e/OS smarphone (Gigaset GS290, /e/OS 1.4 stable) from any other phone, I can hear 4 ring tonalities on the calling device before my smartphone actually starts ringing. If I interrupt the call after 3 ring tonalities, then the call will simply not reach my smartphone. This is annoying.
Any ideas about this issue?
Thanks in advance.