Hallo Dear Community, I figure that the internal MIUI VoIP is not working correctly. If I am mistaken and not just not aware of the right way to do it, I would be glad if someone could share his / her experience. I use MIUI 7 by xiaomi.eu (6.1.21 | Beta) on a Xiaomi Mi4c. In the phone app I can configure the "VOIP Settings" under "Call Settings". I also managed to recieve a call to the account I configured. But I can not manage to make any calls to a regular number via VOIP. No matter how I configure the settings in the "VOIP Menue", I am never asked if I want to use VOIP when I call a number also I see no way to selevt VOIP instead of the SIM card to make a call. Also (as a second problem) once configured for the first time, I cannot make any changes to the VOIP account. I always recieve the error message "protocol cannot be null". Thanks for any ideas!