Phone Comparison - Apple iPhone 4S vs Asus Zenfone 4 vs Xiaomi Redmi Note 4G
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| Manufacturer | Apple | Asus | Xiaomi |
| Announced | October 2011 | January 2014 | August 2014 |
| Status | Available - October 2011 | Available - June 2014 | Available - November 2014 |
| Colors | Black, White | Black, White, Red, Blue, Yellow | Black/White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
115.2 x 58.6 x 9.3 mm (4.54 x 2.31 x 0.37 in) |
124.4 x 61.4 x 6.3-11.2 (4.9 x 2.42 x 0.25-0.44) |
154 x 78.7 x 9.5 mm (6.06 x 3.1 x 0.37 in) |
| Weight | 140 g (4.94 oz) | 115 g (4.06 oz) | 199 g (7.02 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 CDMA2000 1xEV-DO |
GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | TD-SCDMA 1900 / 2000 |
| 4G Network | - | - | TD-LTE 1900 / 2300 / 2600 |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
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| OS | iOS 5 | Android OS, v4.3 (Jelly Bean), upgradable to v4.4.2 (KitKat) | Android OS, v4.2 (Jelly Bean) |
| Processor | 1 GHz dual-core ARM Cortex-A9 processor, Apple A5 chipset | Dual-core 1.2 GHz, Intel Atom Z2520 | Quad-core 1.6 GHz Cortex-A7, Qualcomm MSM8928 Snapdragon 400 |
| GPU | PowerVR SGX543MP2 | PowerVR SGX544MP2 | Adreno 305 |
| RAM | 512 MB | 1 GB | 2 GB |
| Internal Memory | 16/32/64 GB storage | 8 GB | 8 GB |
| External Memory | No | microSD, up to 64 GB | microSD, up to 64 GB |
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| Type | LED-backlit IPS TFT | LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | IPS LCD capacitive touchscreen |
| Colors | capacitive touchscreen | 16M colors | 16M colors |
| Size | 3.5 inches | 4.0 inches | 5.5 inches |
| Resolution | 640 x 960 pixels (330 ppi) | 480 x 800 pixels (233 ppi) | 720 x 1280 pixels (267 ppi) |
| Screen-to-Body Ratio | 53.92% | 59.74% | 68.82% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | FM Radio | FM radio |
| Games | Downloadable, incl. motion-bas | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 8 MP, 3264x2448 pixels | 5 MP, 2592 x 1944 pixels | 13 MP, 4128 x 3096 pixels |
| Flash | LED flash | No | LED flash |
| Features | Auto focus, Touch Focus, Geo-tagging, Face Detection, HDR | Auto focus, Geo-tagging, Panorama | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection, HDR |
| Video | Yes, 1080p@30fps, LED video light, video stabilization, geo-tagging | Yes, 1080p@30fps | 1080p@30fps |
| Front Camera | Yes, VGA [Similar] | Yes, VGA [Similar] | 5 MP [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 14.4 Mbps; HSUPA, 5.8 Mbps | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps | TD-SCDMA; LTE |
| Bluetooth | Yes, v4.0 with A2DP | Yes, v4.0 with A2DP, EDR | v4.0, A2DP, LE |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, Wi-Fi hotspot |
| USB | Yes, v2.0 | Yes, microUSB v2.0 | microUSB v2.0, USB On-the-go |
| GPS | Yes, with A-GPS support and GLONASS | Yes, with A-GPS support | Yes, with A-GPS, GLONASS |
| Browser | HTML (Safari) | HTML | HTML5 |
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| Call Records | 100 received, dialed and missed calls | Practically unlimited | Practically unlimited |
| Internal | 16/32/64 GB storage, 512 MB RAM | 8 GB, 1 GB RAM | 8 GB, 2 GB RAM |
| Expandable Storage | No | microSD, up to 64 GB | microSD, up to 64 GB |
| USB OTG | - | - | Supported |
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| Fingerprint | |
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| Proximity Sensor | |
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| Accelerometer Sensor | |
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| NFC | |
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| Type | Standard battery, Li-Po | Li-Po Battery | Li-Po Battery |
| Capacity | 1432 mAh | 1200/1600 mAh | 3200 mAh |
| Stand by | Up to 200 h (2G) Up to 200 h (3G) |
Up to 192 h | Up to 775 h (3G) |
| Talk Time | Up to 14 h (2G) Up to 8 h (3G) |
Up to 10 h | Up to 38 h (2G) Up to 14 h (3G) |
