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

mobile phones bloggerspot.com

                        Apple iPhone 8


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NETWORK Technology :   GSM / HSPA / LTE
BODY Dimensions : 138.4 x 67.3 x 7.3 mm (5.45 x 2.65 x 0.29 in)
Build : Front/back glass, aluminum frame
SIM : Nano-SIM  - IP67 certified - dust/water resistant (up to 1m for 30 mins)
           Apple Pay (Visa, MasterCard, AMEX certified)
DISPLAY : Type LED-backlit IPS LCD, capacitive touchscreen, 16M colors
Size : 4.7 inches, 60.9 cm2 (~65.4% screen-to-body ratio)
Resolution : 750 x 1334 pixels, 16:9 ratio (~326 ppi density)
Protection :Ion-strengthened glass, oleophobic coating  - Wide color gamut display
- 3D Touch display & home button- True-tone display
CPU : Hexa-core (2x Monsoon + 4x Mistral)
GPU : Apple GPU (three-core graphics)
MEMORY : Card slot No
Internal : 64/256 GB, 2 GB RAM
CAMERA :Primary-12 MP (f/1.8, 28mm), phase detection autofocus, OIS, quad-LED dual-tone flash, check quality
Features :Geo-tagging, simultaneous 4K video and 8MP image recording, touch focus, face/smile detection, HDR (photo/panorama)
Video : 2160p@24/30/60fps, 1080p@30/60/120/240fps, check quality
Secondary :7 MP, f/2.2, 1080p@30fps, 720p@240fps, face detection, HDR, panorama
SOUND Alert types : Vibration, proprietary ringtones
Loudspeaker : Yes, with stereo speakers 3.5mm jack No   Active noise cancellation with dedicated mic
- Lightning to 3.5 mm headphone jack adapter
COMMS WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, hotspot
Bluetooth 5.0, A2DP, LE
GPS Yes, with A-GPS, GLONASS, GALILEO, QZSS
NFC Yes
Radio No
USB 2.0, proprietary reversible connector
- Qi wireless charging
- MP3/WAV/AAX+/AIFF/Apple Lossless player
- MP4/H.265 player
- Audio/video/photo editor
- Document editor
BATTERY :Non-removable Li-Ion 1821 mAh battery (6.96 Wh)
Talk time : Up to 14 h (3G)
Music play :Up to 40 h
MISC Colors Silver, Space Gray, Gold, Red
SAR 1.32 W/kg (head)     1.36 W/kg (body) 
SAR EU 1.19 W/kg (head)     1.17 W/kg (body) 
Price About 700 EUR
TESTS Performance Basemark OS II 2.0: 3934
Display Contrast ratio: 1395:1 (nominal), 3.957 (sunlight)
Camera Photo / Video
Loudspeaker Voice 71dB / Noise 77dB / Ring 80dB
Audio quality Noise -93.5dB / Crosstalk -80.4dB
Battery life

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