I have always used Windows phones and have never had any problems . Unlike my wife who's always cursing her iPhone . I have a dual sim 640 but off last weekend after my provider stopped 2G I cant use it as a dual sim any more . Would love to replace it with another Microsoft dual phone but cant see any dedicated windows phones that do this . Unless the new Nokia 5.1 is using windows ?
I don't know your answer, but would love to see the Windows 10 Mobile OS software being used on other mobile devices. Hey, Microsoft! Will you be collaborating with other mobile devices, using Windows 10 Mobile software?