Regarding inbound calls dumping into cell phone's voicemail when simulring is enabled... Generally, when someone calls my mobile phone and it's off, VZW immediately forwards the call to my VZW voicemail. I don't want that behavior to change. However, if I have simulring on and I drive out of coverage area or my phone's battery dies, I worry that as soon as VZW voicemail picks up, the inbound caller will end up leaving me messages there, and my home phone won't ring (or at least, it won't ring for long). I haven't tested the behavior with Voipo lately; that's just been my experience with other providers in the past.