I don't have this phone, but I'd be curious how it works to integrate with a phone call coming in on a land-line to the cordless hand-set, then handed off to a mobile phone of the Android or IOS variety, which has a totally different phone number.
I know you are supposing that this will work via bluetooth, but it seems rather strange to me, and unless there is some sort of means of remotely answering, i.e. the cordless unit rings halfway across the house, and you can't get there, but you have your mobile phone on you and can thus answer that call, I don't see the point. Mary