After being a professional Software Architect for over 15 years, I decided to start my own business. For contacting some of my clients I use Lync from my Desktop Computer. Some others prefer regular phone calls. My thought was, to setup one of the machines underneath my desk as a sort of 'communication centre', with Lync on it - and VoIP for regular calls (through a ISDN Gateway). That way, I could use the same (USB-)headset, for all of my calls. Also a big benefit would be to have a Soft-Phone on my Android. That way, I could answer phone calls if I'm not on my desk (but still within the range of my WiFi). While I was digging into Asterisk, I stumbled across 3CX. I got curious, the price for 4 sim. calls seams reasonable considering the save in time (when installing my own Asterisk). Funny though, being a relatively paranoid person when it gets to security - I though I might look into the Android app firstly - and I was shocked. The access rights are simply out of range. I do not need another software on the phone that uploads my entire contacts list, reads my emails and whatever else in that matter. And that was pretty much the end of my visit here (except for writing this text).