[RumoredNow]

Lumia 550 Specifications:

• GSM technology
• GSM network: 850 MHz, 900 MHz, 1800 MHz, 1900 MHz
• WCDMA network: Band 1 (2100 MHz), Band 2 (1900 MHz), Band 4 (1700/2100 MHz), Band 5 (850 MHz), Band 8 (900 MHz)¹
• WCDMA network: Band 1 (2100 MHz), Band 5 (850 MHz), Band 8 (900 MHz)²
• LTE FDD network: Band 2 (1900 MHz), Band 4 (1700/2100 MHz), Band 5 (850MHz), Band 7 (2600 MHz), Band 12 (700 MHz), Band 17 (700MHz), Band 28 (700 MHz)³
  
• LTE FDD network: Band 1 (2100 MHz), Band 3 (1800 MHz), Band 7 (2600 MHz), Band 8 (900 MHz), Band 20 (800MHz)⁴
• Speed: HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps

Software Release: Windows 10

• 136.1 x 67.8 x 9.9 mm (5.36 x 2.67 x 0.39 in)
• 141.9 (5.01 oz)
• Nano-SIM
• LCD capacitive touchscreen, TrueColor (24-bit/16M)
• 4.7 inches (~64.7% screen-to-body ratio)
• HD 720 x 1280 pixels (~315 ppi pixel density)
• Enhanced outdoor readability, Lumia Color profile, RGB Stripe, Wide viewing angle, Automatic brightness control

• Qualcomm MSM8909 Snapdragon 210
• 1.1 GHz ARM Cortex A7 Quad-Core
• Adreno 304
• 8 GB internal memory
• 1 GB RAM
• microSD slot up to 200 GB

• ^​Sensors: Ambient light sensor, Accelerometer, Proximity sensor
• 3.5 mm stereo headset connector
• Charging and System connectors: Micro-USB-B, v2.0
• Bluetooth v4.1, A2DP
• GPS with A-GPS, GLONASS, BDS
• Wi-Fi 802.11 /b/g/n, Wi-Fi call⁵, Wi-Fi hotspot (up to 8 Wi-Fi-enabled devices)
• FM radio⁶

• Battery capacity: 2100 mAh (replaceable)
• ​Maximum standby time: 28 days
• Maximum talk time (2G): 16 h, (3G): 14 h, (4G) 17 h
• Maximum music playback time: 60 h
• Maximum Wi-Fi network browsing time: 10 h
• Maximum video playback time: 7.1 h

• User Input: Touch
• Operating keys: Volume keys, Power/Lock key
• Exchangeable back cover
• Other user interface features: Glance screen, Tactile feedback, Vibrating alerts, Voice commands

• Main camera: 5 MP, Auto focus, 2x Digital Zoom, LED Flash
• Sensor size: 1/4 inch
• f-number/aperture: f/2.4
• Camera focal length: 28 mm
• Camera minimum focus range: 10 cm
• Camera features: Auto and manual exposure, Auto and manual white balance, Automatic photo upload to web services, Full resolution photo and video upload, Full screen viewfinder, Geotagging, Touch focus
• Main Camera video frame rate: 720p@30 fps (HD, 1280 x 720)

• Front camera: VGA 2 MP
• Front camera f-number/aperture: f/2.8
• Front camera features: Still image capture, Video call, Video recording
• Front camera video resolution: 480p (VGA, 640 x 480)
• Video recording features: Video zoom (2x), Continuous autofocus, Video light
• Video recording formats: MP4/H.264

1, 3: For the Americas, sources: Microsoft Store US, B&H Photo
2, 4: International Version, sources: Microsoft Store UK
5: Requires compatible carrier support
6: Using the FM radio requires a compatible headset that may be sold separately

Additional Sources: Microsoft.com, GSM Arena