Microsoft Lumia 640 LTE Dual SIM
Microsoft Lumia 640 LTE Dual SIM Windows Mobile smartphone. চালুর তারিখ Mar 2015. ফিচার: 5.0″ IPS LCD ডিসপ্লে, Snapdragon 400 chipset, 8 MP primary ক্যামেরা, 1 MP front ক্যামেরা, 2500 mAh ব্যাটারি, 8 জিবি storage, 1000 MB রেম, Corning Gorilla Glass 3.
Network (নেটওয়ার্ক) | Technology | GSM / HSPA / LTE |
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2G bands | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
3G bands | HSDPA 850 / 900 / 1700 / 1900 / 2100 | |
4G bands | LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 20(800), 28(700), 38(2600), 40(2300) | |
Speed | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | |
GPRS | Yes | |
EDGE | Yes |
Launch (চালু) | Announced | 2015, March |
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Status | Available. Released 2015, April |
Body (বডি) | Dimensions | 141.3 x 72.2 x 8.8 mm (5.56 x 2.84 x 0.35 in) |
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Weight | 145 g (5.11 oz) | |
SIM | Dual SIM (Micro-SIM, dual stand-by) |
Display (ডিসপ্লে) | Type | IPS LCD capacitive touchscreen, 16M colors |
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Size | 5.0 inches, 68.9 cm2 (~67.6% screen-to-body ratio) | |
Resolution | 720 x 1280 pixels, 16:9 ratio (~294 ppi density) | |
Multitouch | Yes | |
Protection | Corning Gorilla Glass 3 | |
- ClearBlack display |
Device Platform প্লাটফর্ম | OS | Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10 |
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Chipset | Qualcomm MSM8926 Snapdragon 400 (28 nm) | |
CPU | Quad-core 1.2 GHz Cortex-A7 | |
GPU | Adreno 305 |
Device Memory (মেমোরি) | Card slot | microSD, up to 256 GB (dedicated slot) |
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Internal | 8 GB, 1 GB RAM |
Main Camera (ক্যামেরা) | Single | 8 MP, f/2.2, 28mm (wide), 1/4", AF |
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Features ফিচার | LED flash | |
Video | 1080p@30fps |
Selfie camera | Single | 1 MP |
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Video | 720p |
Sound (সাউন্ড) | Alert types | Vibration; MP3, WAV ringtones |
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Loudspeaker | Yes | |
3.5mm jack | Yes |
Comms | WLAN | Wi-Fi 802.11 b/g/n, DLNA, hotspot |
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Bluetooth | 4.0, A2DP | |
GPS | Yes, with A-GPS, GLONASS, BDS | |
NFC | Yes | |
Radio | FM radio | |
USB | microUSB 2.0 |
Features ফিচার | Sensors | Accelerometer, proximity, compass |
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Messaging | SMS(threaded view), MMS, Email, Push Email, IM | |
Browser | HTML5 | |
- MP3/WAV/eAAC+/WMA player - MP4/H.264/WMV player - OneDrive (30 GB cloud storage) - Document viewer - Photo/video editor |
Battery ব্যাটারি | Removable Li-Ion 2500 mAh battery | |
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Stand-by | Up to 864 h (2G) / Up to 864 h (3G) | |
Talk time | Up to 26 h 30 min (2G) / Up to 17 h 30 min (3G) |
Misc | Colors | Glossy cyan, Orange, White, Matte black |
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Price | About 150 EUR |
Tests | Display (ডিসপ্লে) | Contrast ratio: 1034 (nominal),2.563 (sunlight) |
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Loudspeaker | Voice 70dB / Noise 65dB / Ring 75dB | |
Audio quality | Noise -93.1dB / Crosstalk -93.2dB | |
Battery ব্যাটারি life | Endurance rating 76h | |