Performance
| Flight mode |
Y |
| Video call |
Y |
| Themes |
Wallpapers |
| Personalization |
Shortcuts, Menu, Icons |
| Support for contact groups |
Y |
| Microphone mute |
Y |
| Personal info management (PIM) |
Alarm clock, Calculator, Calendar, Events reminder, Notes, To-do list |
Display
| Orientation sensor |
Y |
| Touch technology |
Multi-touch |
| Pixel density |
294 ppi |
| Display type |
IPS |
Call management
| Call hold |
Y |
| Speakerphone |
Y |
| Call timer |
Y |
| Call divert |
Y |
| Conference call |
Y |
| Speed dialing |
Y |
| Vibrating alert |
Y |
| Call waiting |
Y |
| Caller ID |
Y |
Camera
| Flash type |
LED |
| Video recording |
Y |
| Auto focus |
Y |
| Front camera |
Y |
| Rear camera resolution (numeric) |
8 MP |
| Maximum frame rate |
30 fps |
| Digital zoom |
4 x |
| Geotagging |
Y |
| Built-in flash |
Y |
| Front camera resolution (numeric) |
0.9 MP |
| Video recording modes |
720p, 1080p |
Software
| Office support |
Y |
| Operating system version |
8.1 |
Navigation
| GPS (satellite) |
Y |
| Assisted GPS (A-GPS) |
Y |
| Position location |
Y |
| GLONASS |
Y |
| Wi-Fi positioning |
Y |
Networking
| Wi-Fi |
Y |
| Near Field Communication (NFC) |
Y |
| 3G |
Y |
| Bluetooth |
Y |
| SIM card capability |
Dual SIM |
| Tethering (modem-mode) |
Y |
| 2G bands (secondary SIM) |
1900, 1800, 900, 850 MHz |
| 2G standards |
GSM |
| 3G standards |
WCDMA |
| 3G bands supported |
850, 900, 2100 MHz |
| SIM card type |
MicroSIM |
Certificates
| Body SAR (EU) |
0.60 W/kg |
| Head SAR (EU) |
0.69 W/kg |
| Digital Living Network Alliance (DLNA) certified |
Y |
Ports & interfaces
| USB port |
Y |
| USB version |
2.0 |
| USB connector type |
Micro-USB |
Processor
| Processor frequency |
1.2 GHz |
| Processor cores |
4 |
Ergonomics
| Accelerometer |
Y |
| Ambient light sensor |
Y |
| Proximity sensor |
Y |
Storage
| Internal storage capacity |
8 GB |
| USB mass storage |
Y |
| Maximum memory card size |
128 GB |
Battery
| Continuous audio playback time |
86 h |
| Browsing time (Wi-Fi) |
10.8 h |
| Talk time (3G) |
17.5 h |
| Talk time (2G) |
26.5 h |
| Continuous video playback time |
8.6 h |
Messaging
| E-mail |
Y |
| Chat |
Y |
| MMS (Multimedia Messaging Service) |
Y |
| Instant messaging (IM) |
Y |
| Short Message Service (SMS) |
Y |
Subscription
| Subscription type |
No subscription |
Additionally
| Battery performance |
2500 mAh |
| Internal RAM |
1 GB |
Lumia 640 Dual-SIM - 5" 1280 x 720 IPS LCD 294 ppi, WCDMA, GSM, Qualcomm Snapdragon 400 Quad core 1200 MHz, RAM: 1 GB, 8.0 MP, Wi-Fi, Bluetooth, NFC, A-GLONASS, A-GPS, Windows Phone 8.1 Lumia Denim
<b>Life made easier</b>
Open the box and power on your Lumia 640 Dual SIM to the full range of free Microsoft services built in and ready to go. Connect to friends and family with Skype, enjoy instant access to your photos and music on OneDrive, and edit files with Microsoft Office from wherever you are. Balancing your work life and personal life just became easier.
<b>Work your way</b>
Buy a new Lumia 640 Dual SIM and a 12 month Office 365 Personal subscription is included. Excited? We’ll tell you more soon…
<b>Power-infused performance</b>
Loaded with all the power you need, the Lumia 640 Dual SIM works as fast and efficiently as you do. It’s a workhorse that lets you concentrate more on what you're doing at any moment, with its quad-core Qualcomm® Snapdragon™ 400 processor and Microsoft Office built in. And you’ll have plenty of juice to help you achieve more with the whopping 2500 mAh battery.
<b>Capture your world with clarity</b>
Want to relive your favorite moments? Capture all of them with superb quality and ease using the Lumia Camera app and 8 MP rear camera, then back them up to OneDrive where you get up to 30 GB of free storage to bring back the moment. And with the wide-angle, front-facing camera, let your family and friends see more of your surroundings clearly in your free HD Skype video calls.
<b>Your favorite apps in a whole new way</b>
Get all the apps and games you want and see them come to life on the 5" (12.7 cm) HD display. Take your pick from a growing selection of hundreds of thousands of apps in Windows Phone Store – from Trip Advisor to Instagram to WhatsApp to Candy Crush Saga. They’re all available and always secure.
<b>A little goes a long way</b>
It’s the small things in life that make a big difference. From the convenience of Action Center to the magic of Live Tiles, the simplicity of Windows Phone makes everyday tasks easier so you can focus on doing what you love.
<b>Accessible at any time</b>
Easily manage your mobile costs and be reachable to all your friends and colleagues with Smart Dual SIM, allowing you to enable call waiting and call forwarding between two SIM cards. Operator charges may apply.
