samsung galaxy s4 specs and weaknesses

• 2G Network: GSM 850 / 900 / 1800 / 1900.
• 3G Network: HSDPA 850 / 900 / 1900 / 2100.
• 4G Network:  LTE (market dependent).
• Micro-SIM.
• Announced in 2013, March.
• Dimensions: 136.6 x 69.8 x 7.9 mm (5.38 x 2.75 x 0.31 in)
• Weight:        130 g (4.59 oz)
• Scree Type: Super AMOLED capacitive touchscreen, 16M colors.
• Screen Size: 1080 x 1920 pixels, 5.0 inches (~441 ppi pixel density).
• Multitouch: available.
• Screen Protection: Corning Gorilla Glass 3.
• Alert types: Vibration; MP3, WAV ringtones.
• Loudspeaker: available.
• 3.5mm jack: available.
• MEMORY: Card slot microSD, up to 64 GB.
• Internal storage: 16/32/64 GB storage, 2 GB RAM.
• GPRS: available.
• EDGE: available.
• WLAN: Wi-Fi 802.11 a/b/g/n/ac, dual-band, DLNA, 
• Wi-Fi Direct, Wi-Fi hotspot.
• Bluetooth: available, v4.0 with A2DP, EDR, LE.
• NFC:  available.
• Infrared port: available.
• USB: Yes, microUSB v2.0 (MHL 2), USB On-the-go, USB Host.
• Primary camera: 13 MP, 4128 x 3096 pixels, autofocus, LED flash, Dual Shot, Simultaneous HD video and image recording, geo-tagging, touch focus, face and smile detection, image stabilization, HDR.
• Video: 1080p@30fps, dual-video rec.
• Secondary camera: 2 MP, 1080p@30fps, dual video call
• OS: Android OS, v4.2.2 (Jelly Bean), v4.3, upgradable to v4.4.2 (KitKat).
• Chipset: Exynos 5 Octa 5410.
• CPU : Quad-core 1.6 GHz Cortex-A15 & quad-core 1.2 GHz Cortex-A7.
• GPU : PowerVR SGX544MP3
• Sensors: Accelerometer, gyro, proximity, compass, barometer, temperature, humidity, gesture.
• Battery:  Li-Ion 2600 mAh battery.
• Stand-by: Up to 370 h.
• normal usage: Up to 17 h.
• Music play: Up to 62 h.