There are a few commercial tools available that offer support for the acquisition of Windows Phone devices. Cellebrite UFED offers support to acquire Windows Phone devices using the physical, filesystem, and logical methods. To determine whether the device you are examining is supported by the tool, you can download and use the UFED Phone Detective mobile app, which is available for free both in App Store and Google Play:
Some of these acquisition methods are more robust, obtain a full physical dump of the data, and can bypass some lock codes on specific devices. However, some device support includes simply extracting contacts and pictures from the device. It is important for the examiner to realize that specific steps must be taken, as directed by the tool. Acquiring these devices is not easy...