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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Saturday, May 26, 2018

Apple iPhone 8

        Apple iPhone 8


NETWORK 
Technology - GSM / HSPA / LTE
BODY 
Dimensions - 158.4 x 78.1 x 7.5 mm (6.24 x 3.07 x 0.30 in)
Weight - 202 g (7.13 oz)
Build - Front/back glass & aluminum frame
SIM - Nano-SIM
- IP67 certified - dust and water resistant
- Water resistant up to 1 meter and 30 minutes
- Apple Pay (Visa, MasterCard, AMEX certified)
DISPLAY 
Type - LED-backlit IPS LCD, capacitive touchscreen, 16M colors
Size - 5.5 inches, 83.4 cm2 (~67.4% screen-to-body ratio)
Resolution - 1080 x 1920 pixels, 16:9 ratio (~401 ppi density)
Multitouch - Yes
Protection - Ion-strengthened glass, oleophobic coating
- Wide color gamut display
- 3D Touch display & home button
- True-tone display
PLATFORM 
OS - iOS 11, upgradable to iOS 11.1
Chipset - Apple A11 Bionic
CPU - Hexa-core (2x Monsoon + 4x Mistral)
GPU - Apple GPU (three-core graphics)
MEMORY 
Card slot - No
Internal - 64 GB, 3 GB RAM
CAMERA 
Primary - Dual 12 MP, (28mm, f/1.8, OIS & 57mm, f/2.8), phase detection autofocus, 2x optical zoom, quad-LED (dual tone) flash
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
Secondary - 7 MP, f/2.2, 32mm, 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 (Apple Pay only)
Radio - No
USB - 2.0, proprietary reversible connector
FEATURES 
Sensors - Fingerprint (front-mounted), accelerometer, gyro, proximity, compass, barometer
Messaging - iMessage, SMS (threaded view), MMS, Email, Push Email
Browser - HTML5 (Safari)
Java - No
- Fast battery charging: 50% in 30 min
- Qi wireless charging
- Siri natural language commands and dictation
- iCloud cloud service
- MP3/WAV/AAX+/AIFF/Apple Lossless player
- MP4/H.265 player
- Audio/video/photo editor
- Document editor
BATTERY 
Battery - Non-removable Li-Ion 2691 mAh battery (10.28 Wh)
Talk time - Up to 21 h (3G)
Music play - Up to 60 h
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