Microsoft Lumia 640 Specifications, Tests and Review

Display
5", 1280 x 720
Front Camera
0.9 Megapixel
Main Camera
8 Megapixel
Operating System
Windows Phone OS 8.1 with Lumia Denim update
Storage
8 GB
RAM
1 GB
Processor
Qualcomm Snapdragon 400
Battery
2500 mAh

Get the key specs, technical data, ratings and full review of Microsoft Lumia 640 all in one place. Compare your selected model with other alternatives and give your decision on the best phone a solid base with our comprehensive overview.

DESIGN AND DIMENSIONS Microsoft Lumia 640
Product Type Smartphone
Form Factor Touch
Height 141.3 mm Better than 55 % of phones rated.
Width 72.2 mm Better than 66 % of phones rated.
Depth 8.8 mm Better than 68 % of phones rated.
Weight 145 g Worse than 51 % of phones rated.
Body Colour Black
Waterproof (Water-resistant) -
SAR Value 0.6 W/kg (body), 0.69 W/kg (head)
Integrated Components FM radio
Connector Type Micro-USB - 5 pin Micro-USB Type B
Headset / AV composite out - mini-phone 3.5mm
SIM Card Type (Size) Micro SIM

The Microsoft Lumia 640 has dimensions 141.3 mm × 72.2 mm × 8.8 mm. Its weight is 145 g.

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DISPLAY Microsoft Lumia 640
Display Type LCD display
Screen Size (Display Size) 5" Better than 56 % of phones rated.
Screen Resolution (Display Resolution) 1280 x 720 pixels Better than 63 % of phones rated.
Display Format HD
Pixel Density 294 ppi Worse than 74 % of phones rated.
Colour Depth 16.7 million colours Better than 98 % of phones rated.
Display Features ClearBlack
Display Protection (Screen Protector) Corning Gorilla Glass 3 (scratch resistant glass)

The screen size reaches 5" inches. Phones with smaller displays have the advantage of being easier to use with one hand. However, compared to phones with large screens, they provide a lower user experience. Nevertheless, if you don't plan to watch movies or play games on your phone regularly and just expect basic functionality, this size should be good enough for you. LCD displays are currently taking a back seat. This is mainly due to higher power consumption. In addition, they have the disadvantage of lower colour contrast, which can be reflected e.g. in the resulting photos. On the other hand, phones with LCD displays are in general cheaper than those with OLED technology.

Display Resolution of Microsoft Lumia 640 is 1280 x 720 pixels. A higher display resolution is a prerequisite for a sharper image. The standard for mid-range phones today is a Full HD resolution of 1920 × 1080 px. Cheaper phones, which usually have a smaller diagonal, have an HD resolution of 1280 × 720 px. Smaller resolutions can only be found in older models. Best phones, on the other hand, have a 4K resolution of 3840 x 2160 px. Another important factor having impact on the final image is display´s pixel density. In case of this model, the value reaches 294 ppi. With pixel density, the higher the value, the sharper the image will be. On average today, the image fineness value is around 350-400 ppi. This will guarantee a sufficiently fine and sharp image for normal use. However, the best phones on the market today are equipped with pixel density of 450 ppi or higher.

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PROCESSOR Microsoft Lumia 640
Processor Type (CPU) Qualcomm Snapdragon 400
Clock Speed 1.2 GHz Worse than 67 % of phones rated.
Processor Core Qty Quad-core Worse than 57 % of phones rated.

Microsoft Lumia 640 is supplied with Qualcomm Snapdragon 400. The number of processor cores is 4. It is a number of cores that plays an important role in evaluating the performance of phone as it is responsible for computing operations. Smartphones already commonly have a core count of around 4 to 8. Multi-core processors can perform better and reduce the processing time of a request to a minimum, which is reflected in the responsiveness of the phone, e.g. in the speed of opening applications. Another important parameter is the processor frequency, which indicates how many instructions the phone can process in one second. Similar to refresh rate, the higher the number, the faster the phone responds. Processor frequency of phone Microsoft Lumia 640 is 1.2 GHz. As standard today, you'll find this value between 1.8 GHz and 2.8 GHz.

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MEMORY Microsoft Lumia 640
RAM 1 GB Worse than 61 % of phones rated.
Internal Memory Size (Storage Capacity) 8 GB Worse than 72 % of phones rated.
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 128 GB

One of the most important parameters for user´s decision is often internal memory capacity. The larger it is, the more apps, photos, movies and other files your phone can store. This phone has 8 GB storage. This memory capacity is ideal for those who have a few basic apps and a few dozen photos on their phone. If you don't expect to use your phone to play games or need to store high-resolution photos, this size should be sufficient. There is almost no probability you're likely to see this low capacity on new smartphones. The standard memory today is around 64 and 128 GB. The best phones have internal memory of 256 GB or more. Nowadays, you can usually find one phone model on the market with several different memory sizes. This allows each user to choose what suits them best.

For this model it is possible to increase the storage size by inserting a memory card.

Size of the RAM memory tells us how powerful the phone is. Microsoft Lumia 640 is equipped with 1 GB. Commonly today you will find phones with 6 to 8 GB of RAM. This means that the phone can easily handle normal operation and more demanding applications or games. Higher RAM of 12 GB can be found in best phones on market and are ideal especially for avid gamers. On the other hand, operating memory below 4 GB is more of an issue with lower-end phones and older models. However, even they will find their fans among less demanding users, who don´t want to spend much on buying new phone.

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CAMERA Microsoft Lumia 640
MAIN CAMERA
Number of Main Cameras 1
Sensor Resolution 8 Megapixel Better than 52 % of phones rated.
Lens Aperture F/2.2 Worse than 73 % of phones rated.
Focus Adjustment Automatic
Minimum Focal Length (Focal Distance) 28 mm
Digital Zoom 4x Better than 57 % of phones rated.
Light Source LED light
Video Resolutions 1920 x 1080 (1080p)
Camera Features (Functions) Lumia Refocus
FRONT CAMERA
Number of Front Cameras 1
Sensor Resolution (Front) 0.9 Megapixel Worse than 95 % of phones rated.

The rear camera of the Microsoft Lumia 640 has only one lens. Single lens is more typical for older phones or lower-end phones with lower quality cameras. The rear cameras of modern phones nowadays are usually equipped with two, three and sometimes even five rear camera lenses. The resolution of main lens is 8 Megapixel. Nonetheless, resolution alone does not necessarily mean a good photo. Therefore, you should look at other parameters such as lens aperture or pixel size. Another important factor is the aperture, which in this case is F/2.2 and determines how much light passes through the sensor. Best phones have an aperture of up to F/1.5. But the most common lenses today are F/1.8 to F/2.2. In this case, the lower the number after the slash, the higher the photo quality.

Digital zoom in this case offers zooming up to 4x. Of course, the higher the lens value, the more distant object can be zoomed in. Nonetheless, the disadvantage of digital zoom is that the quality and sharpness of photo deteriorates when using it.

Front camera
The front camera of phone Microsoft Lumia 640 has one lens. This number of lenses is standard on most smartphones nowadays. The lens is equipped with 0.9 Megapixel. However, do not forget there are other factors than resolution having impact on the final quality of front camera photos.

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BATTERY AND CHARGING Microsoft Lumia 640
Battery Capacity (Battery Size) 2500 mAh Better than 56 % of phones rated.
Standby Time 864 hours Better than 97 % of phones rated.
Talk Time 1590 minutes Better than 89 % of phones rated.
Run Time Details Talk (GSM): up to 1590 min
Talk (WCDMA): up to 1050 min
Playback (video): up to 8.6 hrs
Playback (Music): up to 86 hrs
Active online usage (Wi-Fi): up to 10.8 hrs
Standby: up to 864 hrs
Battery Technology Lithium Ion

The battery size of Microsoft Lumia 640 is 2500 mAh. Nevertheless, battery capacity is not the only factor that affects the phone's battery life. For example - the size of the display, the performance of the processor, the use of data functions and, of course, the intensity of use of phone in general all have a significant impact on battery life. Standard for most smartphones today is a battery capacity of around 4500 to 5000 mAH. Phones with this battery size usually guarantee a phone life of at least 1 day. Older or cheaper smartphone models can then reach battery capacities typically around 2500 mAH and below. With this capacity, you may find that if you use your phone heavily, you may need to recharge your phone during the day.

The standby time for this phone is 864 hours and tells us how long the phone lasts on a single charge when you're not actively using it. The phone Microsoft Lumia 640 will last one charge with constant phone calls 1590 minutes.

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CELLULAR Microsoft Lumia 640
Technology WCDMA (UMTS) / GSM
Mobile Broadband Generation 4G Better than 88 % of phones rated.
Operating System Windows Phone OS 8.1 with Lumia Denim update
Intelligent Assistant Cortana
Navigation A-GPS, GLONASS, BeiDou

Standard 4G connectivity is currently being replaced by 5G, but is still the preserve of the latest phones. Microsoft Lumia 640 supports 4G. 3G connectivity is now only found in the oldest phones. The operating system in the case of this model is Windows Phone OS 8.1 with Lumia Denim update.

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COMMUNICATIONS Microsoft Lumia 640
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE
2G Band 850 GSM, 900 GSM, 1800 GSM, 1900 GSM
4G LTE Band Band 1, Band 3, Band 7, Band 8, Band 20
4G LTE Frequency FDD 2100, FDD 1800+, FDD 2600, FDD 900, FDD 800 DD
Wireless Interface IEEE 802.11b/g/n
Bluetooth Bluetooth 4.0
Bluetooth Profiles HFP, OPP, PAN, A2DP, AVRCP, HID, PBAP, MAP, GATT
NFC Yes Better than 66 % of phones rated.
WLAN Security WEP, WPA, WPA2, TKIP, AES
Communication Features Mobile Email client, Internet browser
Messaging Services Skype, WhatsApp, SMS, MMS

Contactless payments are not a problem with this phone, thanks to NFC function. It can also be used, for example, to unlock doors or load menus in a restaurant using an NFC tag. Bluetooth 4.0 must not be missing from the basic package. It makes it easy to connect wireless headphones to your phone, connect your phone to your TV, tablet, speaker and more.

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MEDIA Microsoft Lumia 640
Supported Digital Audio Standards AAC, AMR, MP3
Supported Digital Video Standards VC-1, AVC, MPEG-4, WMV, H.264, H.263
FEATURES Microsoft Lumia 640
Phone Functions Speakerphone, voice control, call timer, conference call, vibrating alert
Sensors Accelerometer, ambient light sensor, proximity sensor, magnetometer
Personal Information Management Calendar, synchronization with PC, calculator, reminder, alarm clock
Additional Phone Features TTY compatible, DLNA Certified, Text-to-Speech (text recognition), sharing media via DLNA, Kid's Corner, Noise Cancellation Technology, Lumia Color profile, Word Flow keyboard, Power Saving Mode, SensorCore technology
OTHERS Microsoft Lumia 640
Included Accessories Power adapter
Compliant Standards HAC (Hearing Aid Compatible)

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