![Microsoft now enabling native Wi-Fi calling, HD Voice on the Lumia 640 and Lumia 640 XL | Windows Central Microsoft now enabling native Wi-Fi calling, HD Voice on the Lumia 640 and Lumia 640 XL | Windows Central](https://cdn.mos.cms.futurecdn.net/vCvvpM56wc7ddywuAgnJrW.jpg)
Microsoft now enabling native Wi-Fi calling, HD Voice on the Lumia 640 and Lumia 640 XL | Windows Central
![Amazon.com: Microsoft Nokia Lumia 640 LTE RM-1072 8GB 5" Unlocked GSM Windows 8MP Camera Smartphone - Black - International Version No Warranty : Cell Phones & Accessories Amazon.com: Microsoft Nokia Lumia 640 LTE RM-1072 8GB 5" Unlocked GSM Windows 8MP Camera Smartphone - Black - International Version No Warranty : Cell Phones & Accessories](https://m.media-amazon.com/images/I/61DxZWLcJDL._AC_SS300_.jpg)
Amazon.com: Microsoft Nokia Lumia 640 LTE RM-1072 8GB 5" Unlocked GSM Windows 8MP Camera Smartphone - Black - International Version No Warranty : Cell Phones & Accessories
![Microsoft Lumia 640 XL: the de facto phablet for business and budgets review - All About Windows Phone Microsoft Lumia 640 XL: the de facto phablet for business and budgets review - All About Windows Phone](http://mediafiles.allaboutwindowsphone.com/640xl/front.jpg)