Cell Phone,In the 1990s, the 'second generation' mobile phone systems emerged. Two systems competed for supremacy in the global market: the European developed GSM standard and the U.S. developed CDMA standard. These differed from the previous generation by using digital instead of analog transmission, and also fast out-of-band phone-to-network signaling. The rise in mobile phone usage as a result of 2G was explosive and this era also saw the advent of prepaid mobile phones.

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Tuesday, May 15, 2018

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                              Samsung Galaxy S9                                           



Dimensions :  147.7 x 68.7 x 8.5 mm (5.81 x 2.70 x 0.33 in) Weight163 g (5.75 oz)
Build Front/back glass (Gorilla Glass 5), aluminum frame
SIM Single SIM (Nano-SIM) or Hybrid Dual SIM (Nano-SIM, dual stand-by)  - Samsung Pay (Visa, MasterCard certified) - IP68 certified - dust/water proof (up to 1.5m for 30 mins)
DISPLAY :Type Super AMOLED capacitive touchscreen, 16M colors
Size 5.8 inches, 84.8 cm2 (~83.6% screen-to-body ratio)
Resolution:1440 x 2960 pixels, 18.5:9 ratio (~570 ppi density)
Multitouch:Yes
Protection Corning Gorilla Glass 5  - HDR10 compliant -. 3D Touch (home button only)
9810 Octa - EPLATFORM OS Android 8.0 (Oreo)
CPU Octa-core (4x2.7 GHz Mongoose M3 & 4x1.8 GHz Cortex-A55) - EMEA
                Octa-core (4x2.8 GHz Kryo 385 Gold & 4x1.7 GHz Kryo 385 Silver) - USA/LATAM, China
GPU Mali-G72 MP18 - EMEA
MEMORY Card slot microSD, up to 400 GB (uses SIM 2 slot) - dual SIM model only
Internal 64/128/256 GB, 4 GB RAM
CAMERA Primary 12 MP (f/1.5-2.4, 26mm, 1/2.5", 1.4µm, Dual Pixel PDAF), phase detection autofocus, OIS, LED flash, check quality
Features Geo-tagging, simultaneous 4K video and 9MP image recording, touch focus, face/smile detection, Auto HDR, panorama
Video 2160p@60fps, 1080p@240fps, 720p@960fps, HDR, dual-video rec., check quality
Secondary 8 MP (f/1.7, 25mm, 1/3.6", 1.22µm), autofocus, 1440p@30fps, dual video call, Auto HDR
SOUND Alert types Vibration; MP3, WAV ringtones
Loudspeaker Yes, with stereo speakers 3.5mm jack Yes 
- 32-bit/384kHz audio  - Active noise cancellation with dedicated mic
COMMS WLAN :Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
Bluetooth :5.0, A2DP, LE, aptX
GPS :Yes, with A-GPS, GLONASS, BDS, GALILEO
NFC :Yes
Radio :FM radio (USA & Canada only)
USB :3.1, Type-C 1.0 reversible connector
FEATURES : Sensors Iris scanner, fingerprint (rear-mounted), accelerometer, gyro, proximity, compass, barometer, heart rate, SpO2
Messaging SMS(threaded view), MMS, Email, Push Email, IM
Browser HTML5  - Samsung DeX (desktop experience support)   Fast battery charging (Quick Charge 2.0) - Qi/PMA wireless charging (market dependent)- ANT+ support - Bixby natural language commands and dictation   MP4/DivX/XviD/H.265 player MP3/WAV/eAAC+/FLAC player  - Photo/video editor - Document editor  
          
BATTERY Non-removable Li-Ion 3000 mAh battery (11.55 Wh)
MISC Colors Midnight Black, Coral Blue, Titanium Gray, Lilac Purple
Price About 840 EUR
TESTS Performance Basemark OS II: 3329 / Basemark OS II 2.0: 3382
Basemark X: 42645
Display Contrast ratio: Infinite (nominal), 4.630 (sunlight)
Camera Photo / Video
Loudspeaker Voice 68dB / Noise 74dB / Ring 81dB
Audio quality Noise -93.4dB / Crosstalk -93.9dB
Battery life
Endurance rating 78h
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