Microsoft Lumia 640 XL LTE Dual Sim Specifications, Tests and Review

Display
5.7", 1280 x 720
Front Camera
5 Megapixel
Main Camera
13 Megapixel
Operating System
Windows Phone OS 8.1 with Lumia Denim update (upgradable to Windows 10)
Storage
8 GB
RAM
1 GB
Processor
Qualcomm Snapdragon 400
Battery
3000 mAh

Complete technical specifications, details, expert ratings and review of Microsoft Lumia 640 XL LTE Dual Sim. Find out how your chosen phone stacks up against the competition and whether it's the one that best meets your expectations with the phone comparison feature.

Microsoft Lumia 640 XL LTE Dual Sim Full Specifications and Details

design and dimensions display processor memory camera battery and charging cellular communications media features others

DESIGN AND DIMENSIONS Microsoft Lumia 640 XL LTE Dual Sim
Product Type Smartphone
Form Factor Touch
Height 157.9 mm Better than 82 % of phones rated.
Width 81.5 mm Better than 97 % of phones rated.
Depth 9 mm Better than 63 % of phones rated.
Weight 171 g Worse than 72 % of phones rated.
Body Colour Black
Waterproof (Water-resistant) -
SAR Value 0.4 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
SIM Card Qty Dual-SIM

The Microsoft Lumia 640 XL LTE Dual Sim has a height of 157.9 mm, a width of 81.5 mm and a thickness of 9 mm. The weight of the phone is 171 g.

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DISPLAY Microsoft Lumia 640 XL LTE Dual Sim
Display Type LCD display
Screen Size (Display Size) 5.7" Better than 72 % of phones rated.
Screen Resolution (Display Resolution) 1280 x 720 pixels Better than 63 % of phones rated.
Display Format HD
Pixel Density 259 ppi Worse than 89 % 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 5.7" inches. With a large display, phone offers a great experience for watching videos, playing games and reading. The best phones today are 6.5'' or more. They have the advantage of a large display area that allows you to see more content than with conventional display sizes. 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 XL LTE Dual Sim 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. Display´s pixel density is 259 ppi and represents another significant factor affecting image sharpness besides resolution. The higher the value, the sharper the image. Average value is currently about 350-400 ppi, which guarantees a fine and sufficiently sharp image. Finest modern phone displays reach 450 ppi and above.

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PROCESSOR Microsoft Lumia 640 XL LTE Dual Sim
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 XL LTE Dual Sim is equipped 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. The processor frequency indicates how many instructions phone can process in 1 second. The higher the frequency, the better the performance. Standard processor frequency range today is between 1.8 GHz and 2.8 GHz. Microsoft Lumia 640 XL LTE Dual Sim reaches the frequency of 1.2 GHz.

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MEMORY Microsoft Lumia 640 XL LTE Dual Sim
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´s internal memory capacity is 8 GB. The size of the internal storage determines e.g., how many photos, songs, movies, or applications you can store on your phone. 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. Luckily, most smartphone manufacturers nowadays offer models with different memory sizes to suit every user.

An additional option to increase the storage capacity of this model is to insert a memory card.

RAM memory of the Microsoft Lumia 640 XL LTE Dual Sim is 1 GB. Most powerful phones currently have an operating memory of 12 GB or more, which is especially useful for demanding users such as gaming enthusiasts. Normally, phones nowadays have 6 to 8 GB of RAM, which means that the phone can easily handle normal operation and more demanding applications. Operating memory of less than 4 GB is found in lower-end phones or older models, and they are suitable for low-end users who don't use demanding applications and have the phone more for basic use.

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CAMERA Microsoft Lumia 640 XL LTE Dual Sim
MAIN CAMERA
Number of Main Cameras 1
Sensor Resolution 13 Megapixel Better than 78 % of phones rated.
Sensor Type BSI
Lens Aperture F/2.0 Worse than 52 % 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) Carl Zeiss optic, Lumia Refocus
FRONT CAMERA
Number of Front Cameras 1
Sensor Resolution (Front) 5 Megapixel Worse than 55 % of phones rated.

The rear camera of the Microsoft Lumia 640 XL LTE Dual Sim 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 the main lens is 13 Megapixel. Higher resolution does not necessarily mean super high quality photos. Furthermore, it depends on the pixel size but also on other important factors. The aperture of main lens reaches F/2.0 value. The best phones have a lens with an aperture of up to F/1.5, where more light can pass through sensor and photos will be of a high quality even in low light conditions. However, lenses with apertures around F/1.8 to F/2.2 are the most common. The lower the number after the slash, the better 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 XL LTE Dual Sim has one lens. This number of lenses is standard on most smartphones nowadays. The resolution of front lens reaches 5 Megapixel. Again, it should be noted that resolution is only one of several other significant factors that affect resulting quality of a photo.

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BATTERY AND CHARGING Microsoft Lumia 640 XL LTE Dual Sim
Battery Capacity (Battery Size) 3000 mAh Better than 69 % of phones rated.
Standby Time 888 hours Better than 97 % of phones rated.
Talk Time 1800 minutes Better than 92 % of phones rated.
Run Time Details Talk (GSM): up to 1800 min
Talk (WCDMA): up to 1440 min
Playback (video): up to 11 hrs
Playback (Music): up to 98 hrs
Active online usage (Wi-Fi): up to 14 hrs
Standby (dual SIM): up to 888 hrs
Battery Technology Lithium Ion

The battery size of Microsoft Lumia 640 XL LTE Dual Sim is 3000 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 888 hours and it expresses the maximum time your phone can last on a single charge when you are not actively using it. Talk time, or we can say battery life when making calls, then indicates amount of time your phone will last from a full charge if you are constantly on a call. Microsoft Lumia 640 XL LTE Dual Sim is provided with a talk time about 1800 minutes.

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CELLULAR Microsoft Lumia 640 XL LTE Dual Sim
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 (upgradable to Windows 10)
Navigation A-GPS, GLONASS, BeiDou

Microsoft Lumia 640 XL LTE Dual Sim supports 4G. 5G connectivity, which is slowly replacing standard 4G connectivity, is still more the preserve of the latest phones. The operating system in this case is Windows Phone OS 8.1 with Lumia Denim update (upgradable to Windows 10).

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COMMUNICATIONS Microsoft Lumia 640 XL LTE Dual Sim
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE
2G Band 850 GSM, 900 GSM, 1800 GSM, 1900 GSM
4G LTE Band Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 17, Band 20, Band 28
4G LTE Frequency FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700b, FDD 800 DD, FDD 700 APT
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, LTE Cat.4
Messaging Services Skype, WhatsApp, SMS, MMS

Fans of modern technology will appreciate NFC function, which allows, among other things, contactless mobile phone payments, but also finds other uses in connectivity, such as unlocking the door or loading the menu in restaurant using the NFC tag. Basic connectivity standards also include Bluetooth 4.0, making it easy to communicate wirelessly with other devices such as headphones, tablets, speakers and smartwatches.

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MEDIA Microsoft Lumia 640 XL LTE Dual Sim
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 XL LTE Dual Sim
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
Dual SIM Card Capability Yes
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 XL LTE Dual Sim
Included Accessories Power adapter

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