Microsoft Lumia 640 LTE 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

A detailed list of technical data, specifications, ratings and expert review of Microsoft Lumia 640 LTE. Get a comprehensive look at your chosen phone and see if this is the one that will best suit your needs. You can also use the comparison feature to compare with other competing phones.

DESIGN AND DIMENSIONS Microsoft Lumia 640 LTE
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 White | Orange | 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

Design of Microsoft Lumia 640 LTE has dimensions of 141.3 mm × 72.2 mm × 8.8 mm and weight of 145 g.

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DISPLAY Microsoft Lumia 640 LTE
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. Smaller phone displays are not necessarily a disadvantage. They are easier to use with one hand. However, displays of these sizes don't provide the same experience when watching videos or playing games, so they're better suited for less demanding users. It means, if you're a basic user and you don't expect to use your phone for activities like watching videos or playing games on regular basis, this size is perfectly adequate. The disadvantage of LCD displays is the relatively lower color contrast displayed, as the technology cannot display absolute black well. Also due to the higher power consumption, LCD displays are no longer as common in phones. Even so, some manufacturers still equip their phones with LCD technology. However, modern smartphones are already using OLED technology. The advantage of LCD phones is that they tend to be cheaper to build than OLED technology.

Display Resolution of Microsoft Lumia 640 LTE 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. If you want a perfect picture, focus on pixel density in addition to resolution. This number indicates how sharp the image will be. Best phones today have a display fineness of 450 ppi or higher, but the today´s average is around 350-400 ppi. That should be enough for you to enjoy a fine and sharp image. This model has a pixel density of 294 ppi.

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PROCESSOR Microsoft Lumia 640 LTE
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.

The processor type of the Microsoft Lumia 640 LTE is 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. Microsoft Lumia 640 LTE is provided with processor´s frequency of 1.2 GHz. Normally today you will find this value between 1.8 and 2.8 GHz, and the higher the number, the faster the response of the phone. The processor frequency will thus be one of the important parameters if you are looking for a phone capable of managing several requests at once without major problems.

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MEMORY Microsoft Lumia 640 LTE
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

The phone is provided with an internal memory of 8 GB. Internal storage capacity is often a key parameter, as it determines how many files, photos, apps and more your phone can store. 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. Fortunately, manufacturers nowadays think of all users and therefore offer phone models with different memory sizes so that everyone can choose what suits them.

In addition, if you need more memory, this model offers the option of inserting a memory card to increase the storage size.

Operating memory significantly affects the performance of the entire phone. Microsoft Lumia 640 LTE has an operating memory of 1 GB. Phones with less than 4 GB of RAM are better suited for undemanding users who use phone more for basic needs and some essential applications only. But if you are a heavy user, reach for at least 6 to 8 GB of RAM, which is the standard today, or 12 GB for the really demanding ones.

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CAMERA Microsoft Lumia 640 LTE
MAIN CAMERA
Number of Main Cameras 1
Sensor Resolution 8 Megapixel Better than 52 % of phones rated.
Sensor Type BSI
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 LTE 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. A high resolution lens alone does not necessarily mean high quality photos. The main lens in this has a resolution of 8 Megapixel. However, if you are looking for perfect photos, in addition to resolution, don't forget to focus on at other parameters such as lens aperture or pixel size. Luminance is one of the main factors determining the quality of a photograph. Commonly today, this value ranges between F/1.8 and F/2.2. However, best photomobiles have an aperture of up to F/1.2. Value indicates how much light passes through the sensor and the lower it is, the better the quality of the photos. Main lens here is equipped with F/2.2.

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 LTE has one lens. This number of lenses is standard on most smartphones nowadays. The resolution of main lens reaches 0.9 Megapixel. Again, it should be noted that resolution is not the only factor affecting the quality of the front camera photo.

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BATTERY AND CHARGING Microsoft Lumia 640 LTE
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 LTE 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.

Standby time is 864 hours. The value indicates how long your phone will last on a single charge when you are not actively using it. The battery life when making calls is, like standby time, a figure that tells us how long the phone will last on a single charge when making continuous calls. For the Microsoft Lumia 640 LTE it is 1590 minutes.

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CELLULAR Microsoft Lumia 640 LTE
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

Microsoft Lumia 640 LTE supports 4G. 4G connectivity is still common today, although the latest phones already have 5G connectivity. 3G connectivity is now more of a thing of past and can only be found on older models. The phone's operating system is Windows Phone OS 8.1 with Lumia Denim update.

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COMMUNICATIONS Microsoft Lumia 640 LTE
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

The NFC function will please all fans of contactless mobile payments. In addition, you can also use function in the context of connectivity, for example, to unlock doors or load menus in restaurants. Bluetooth 4.0 makes it easy to connect your phone to other wireless devices such as headphones, speakers, TV or tablet and more.

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MEDIA Microsoft Lumia 640 LTE
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 LTE
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 LTE
Included Accessories Power adapter
Compliant Standards HAC (Hearing Aid Compatible)

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