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OS Microsoft Windows Phone 8.1 with Lumia Denim, upgradable to Windows 10 Mobile (Live Tiles Metro UI, Cortana Voice Assistant, OneDrive & Microsoft Office 365!)
Chipset Qualcomm Snapdragon 400 MSM8926 (28 nm 1.2GHz Quad-Core 32-bit Cortex-A7 Processor with Adreno 305 GPU @ 450MHz)
RAM 1GB RAM
Storage 8GB
Display 5.0 inches • 720 x 1280 pixels (16:9, Giant 5.0" HD 720p 16:9 IPS LCD ClearBlack Display with Glance Screen, 294 ppi)
Main camera Pro Flagship 8.0 MP Rear Camera with 1/4" Sensor, Dynamic Flash, Lumia Camera Suite, Rich Capture & 1080p Video: 8.0 MP f/2.2 28mm (autofocus in 0.2s!, Dynamic Flash, Rich Capture HDR, 1080p@30fps Full HD video recording with stereo audio) with High-Power LED flash
Selfie camera Pro Flagship 1.0 MP Front Camera with 720p HD Video & Skype (1.0 MP f/2.4, 720p@30fps HD video for Skype calls)
Battery Monumental 2500 mAh Colossal Monster Battery! (Removable Li-Ion BV-T5C, swappable on the go! Powers over 17.5 hours continuous calling / 864 hours (over 36 DAYS!) standby / 8.5 hours continuous video / 86 hours audio!), Micro-USB 2.0 charging + Power Saver • Removable Li-Ion 2500 mAh (BV-T5C, swappable on the go!)
Weight 145 g (5.11 oz)

Latest Microsoft Lumia 640 user agents:

User Agent Browser Platform
UCWEB/2.0 (Windows; U; wds 8.10; zh-CN; Microsoft; RM-1113_1003) U2/1.0.0 UCBrowser/4.2.1.541 U2/1.0.0 Mobile UC Browser 4 Windows Phone 8Lumia 640
UCWEB/2.0 (Windows; U; wds 8.10; de-DE; Microsoft; RM-1077_1011) U2/1.0.0 UCBrowser/4.2.1.541 U2/1.0.0 Mobile UC Browser 4 Windows Phone 8Lumia 640
Mozilla/5.0 (Windows Phone 8.1; ARM; Trident/7.0; Touch; rv:11.0; WebBrowser/8.1; IEMobile/11.0; Microsoft; RM-1109) like Gecko IE Mobile 11 Windows Phone 8Lumia 640
Mozilla/5.0 (Windows Phone 8.1; ARM; Trident/7.0; Touch; rv:11.0; IEMobile/11.0; Microsoft; RM-1109) like Gecko IE Mobile 11 Windows Phone 8Lumia 640
Mozilla/5.0 (Windows Phone 10.0; Android 6.0.1; Microsoft; RM-1113) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Mobile Safari/537.36 Edge/15.15254 Microsoft Edge 15 Windows Phone 10Lumia 640
Mozilla/5.0 (Windows Phone 10.0; Android 6.0.1; Microsoft; RM-1113) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Mobile Safari/537.36 Edge/15.15063 Microsoft Edge 15 Windows Phone 10Lumia 640
Mozilla/5.0 (Windows Phone 10.0; Android 6.0.1; Microsoft; RM-1109; Cortana 1.8.12.15063; 10.0.0.0.15063.909) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Mobile Safari/537.36 Edge/15.15063 Cortana 1 Windows Phone 10Lumia 640
Mozilla/5.0 (Windows Phone 10.0; Android 6.0.1; Microsoft; RM-1109) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Mobile Safari/537.36 Edge/15.15254 Microsoft Edge 15 Windows Phone 10Lumia 640
Mozilla/5.0 (Windows Phone 10.0; Android 6.0.1; Microsoft; RM-1109) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Mobile Safari/537.36 Edge/15.15063 Microsoft Edge 15 Windows Phone 10Lumia 640
Mozilla/5.0 (Windows Phone 10.0; Android 6.0.1; Microsoft; RM-1074) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Mobile Safari/537.36 Edge/15.15063 Microsoft Edge 15 Windows Phone 10Lumia 640
Mozilla/5.0 (Windows Phone 10.0; Android 6.0.1; Microsoft; RM-1074) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.79 Mobile Safari/537.36 Edge/14.14393 Microsoft Edge 14 Windows Phone 10Lumia 640
Mozilla/5.0 (Windows NT 6.2; ARM; Trident/7.0; Touch; rv:11.0; WPDesktop; RM-1113) like Gecko Internet Explorer 11 Windows RTLumia 640
Mozilla/5.0 (Windows NT 6.2; ARM; Trident/7.0; Touch; rv:11.0; WPDesktop; RM-1109) like Gecko Internet Explorer 11 Windows RTLumia 640
Mozilla/5.0 (Windows NT 10.0; ARM; RM-1113) AppleWebKit/537.36 (KHTML like Gecko) Chrome/46.0.2486.0 Safari/537.36 Edge/13.10586 Microsoft Edge 13 Windows 10Lumia 640
Mozilla/5.0 (Windows NT 10.0; ARM; RM-1109) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36 Edge/15.15063 Microsoft Edge 15 Windows 10Lumia 640
Mozilla/5.0 (Mobile; Windows Phone 8.1; Android 4.0; ARM; Trident/7.0; Touch; rv:11.0; IEMobile/11.0; Microsoft; RM-1113) like iPhone OS 7_0_3 Mac OS X AppleWebKit/537 (KHTML, like Gecko) Mobile Safari/537 UCBrowser/4.2.0.524 Mobile UC Browser 4 Windows Phone 8Lumia 640
Mozilla/5.0 (Mobile; Windows Phone 8.1; Android 4.0; ARM; Trident/7.0; Touch; rv:11.0; IEMobile/11.0; Microsoft; RM-1113) like iPhone OS 7_0_3 Mac OS X AppleWebKit/537 (KHTML, like Gecko) Mobile Safari/537 IE Mobile 11 Windows Phone 8Lumia 640
Mozilla/5.0 (Mobile; Windows Phone 8.1; Android 4.0; ARM; Trident/7.0; Touch; rv:11.0; IEMobile/11.0; Microsoft; RM-1109) like iPhone OS 7_0_3 Mac OS X AppleWebKit/537 (KHTML, like Gecko) Mobile Safari/537 IE Mobile 11 Windows Phone 8Lumia 640
Mozilla/5.0 (Mobile; Windows Phone 8.1; Android 4.0; ARM; Trident/7.0; Touch; rv:11.0; IEMobile/11.0; Microsoft; RM-1077) like iPhone OS 7_0_3 Mac OS X AppleWebKit/537 (KHTML, like Gecko) Mobile Safari/537 IE Mobile 11 Windows Phone 8Lumia 640
Mozilla/5.0 (Mobile; Windows Phone 8.1; Android 4.0; ARM; Trident/7.0; Touch; rv:11.0; IEMobile/11.0; Microsoft; RM-1076) like iPhone OS 7_0_3 Mac OS X AppleWebKit/537 (KHTML, like Gecko) Mobile Safari/537 IE Mobile 11 Windows Phone 8Lumia 640
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