Microsoft has released a new app into the Windows Store for users with Dual-SIM windows phones.
The app notes that it offers :
Personalize the experience of your Microsoft Lumia with this useful application that, once installed, will end up in the settings of your phone.
The app offers the ability to set call divert settings and so forth, but unfortunately not having a dual-SIM phone we can not detail it completely.
If you do have such a device however grab the app from the Windows Store here.