The Microsoft Lumia 640 Dual SIMwas released in April of 2015. The device was released as a mid segment device by the company.

Software & Hardware

The device was released with the Microsoft Windows Phone 8.1. The device is backedwith a Quad-core 1.2 GHz Cortex-A7 processor, while the chipset used in the device is Qualcomm Snapdragon 400. The graphics are being powered by the Adreno 305chipset. TheMicrosoft Lumia 640 Dual SIM features 1 GB of RAM, which is used for running apps and multi-tasking between them. The unlocked cellphone features an internal storage of 8 GB for installing applications. The memory of the device can be expanded up to 128 GB via the use of an external SD card for storing media, such as music, video etc. The phone is operated by a Li-ion 2500 mAh battery for prolonged battery life.

Design & Display

The screen size of the unlocked cellphone 5.0Inches, and it is an IPS LCD display panel with a resolution of 720 x 1280 pixels, witha pixel per inch density of 294. The dimensions of the unlocked cellphone are 141.3 x 72.2 x 8.8 mm, with a weight of 145 grams.

Camera

The Microsoft Lumia 640 Dual SIM features an 8MP rear camera, with an f/2.2 aperture, capable of clicking photographs. The camera quality is decent, and it capture fine amount of details. It can also record videos of 1080p at 30 fps. There is a secondary 1 MP front-facing camera, available in the unlocked cellphone for clicking selfies and recording videos.