Lisa Gade reviews Microsoft’s flagship Lumia phablet, the 5.7” 950 XL. In some ways it is simply a larger, faster version of the Lumia 950 we reviewed, but there are other differences including a dual SIM design and a bigger battery. The GSM unlocked Lumia runs Windows 10 Mobile on the Qualcomm Snapdragon 810 2.0 GHz octal-core CPU with Adreno 430 graphics, 3 gigs of RAM and 32 gigs of storage. It has a microSD card slot compatible with cards up to 200 gigs, a removable 3340 mAh battery, dual band WiFi 802.11ac, Bluetooth 4.1, NFC and a GPS. The Lumia has a QHD AMOLED display, 4G LTE on a wide selection of bands (works on both AT&T and T-Mobile in the US), a front 5MP camera, rear 20MP PureView camera with Zeiss lens and try-tone LED flash and a Windows Hello camera for iris recognition (biometric authentication). It supports Windows Continuum and has Cortana the virtual assistant. It sells for $649 with no contract.