The Microsoft Lumia 640 features a 5-inch HD display, comes in a range of vivid colors, and runs on Windows Phone 8.1 (it's set to get upgraded to Windows 10 in the not too distant future). The Lumia 640 has all the options you'd expect from an affordable phone: more specifically, it arrives in a single- and dual-SIM versions with both a 3G model and 4G LTE version of the handset, including a dual-SIM LTE device. The handset comes in a range of colors including cyan, orange, black and white. It's also got an 8-megapixel camera with dynamic flash and auto HDR, as well as a front-facing camera with wide-angle lens. It is pre-loaded with the latest Lumia camera app update.

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Battery

Device Battery Type

Non-removable

Device Talk Time

Up to 26 hours

Camera

Device Primary Camera Flash

LED

Device Primary Camera Resolution

3264 x 2448

Device Secondary Camera

1 Megapixel

Connectivity & Data

Device 2G

GSM 850/900/1800/1900

Device 3g

HSDPA 850/900/2100

Device 4G

LTE 850/900/1800/2100/2600

Device Bluetooth

4.0 with A2DP

Device Bluetooth

4.0 with A2DP

Device GPS

A-GPS, GLONASS and Beidou

Device WIFI

802.11 b/g/n

CPU

Device Processor

1.2 GHz Quad-core

Device Chipset

Qualcomm Snapdragon 400

Display

Device Display Resolution

1280 x 720

Device Display Size

5.0

Device Display Type

IPS

General

Device IP Rating

Not rated

Memory

Device Internal Memory

8GB

Other Features

Device Memory Card Slot

MicroSD up to 128GB

Size & Weight

Device Weight Grams

145

Device Dimensions

141.3 x 72.2 x 8.8 mm

The 640s large 5 inch screen and powerful quad-core Qualcomm® Snapdragon processor makes it a great phone for getting work done on the move.