Phone Comparison - BlackBerry Curve 8520 vs Samsung Galaxy Ace Style vs Xiaomi Redmi Note 4G
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| Manufacturer | BlackBerry | Samsung | Xiaomi |
| Announced | July 2009 | April 2014 | August 2014 |
| Status | Available - August 2009 | Available - April 2014 | Available - November 2014 |
| Colors | Black | Black, White | Black/White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
109 x 60 x 13.9 mm
(4.29 x 2.36 x 0.55 in ) |
121.2 x 62.7 x 10.7 mm (4.77 x 2.47 x 0.42 in) |
154 x 78.7 x 9.5 mm (6.06 x 3.1 x 0.37 in) |
| Weight | 106 g (3.74 oz) | 123 g (4.34 oz) | 199 g (7.02 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 |
| 3G Network | HSDPA 900 / 2100 | TD-SCDMA 1900 / 2000 | |
| 4G Network | - | - | TD-LTE 1900 / 2300 / 2600 |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
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| OS | BlackBerry OS | Android OS, v4.4.2 (KitKat) | Android OS, v4.2 (Jelly Bean) |
| Processor | 512MHz | Dual-core 1.2 GHz | Quad-core 1.6 GHz Cortex-A7, Qualcomm MSM8928 Snapdragon 400 |
| GPU | - | Adreno 305 | |
| RAM | N/A | 512 MB | 2 GB |
| Internal Memory | 256 MB | 4 GB ROM | 8 GB |
| External Memory | microSD, up to 32GB | microSD, up to 64 GB | microSD, up to 64 GB |
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| Type | TFT | TFT capacitive touchscreen | IPS LCD capacitive touchscreen |
| Colors | 65K colors | 16M colors | 16M colors |
| Size | 2.46 inches | 4.0 inches | 5.5 inches |
| Resolution | 320 x 240 pixels (163 ppi) | 480 x 800 pixels (233 ppi) | 720 x 1280 pixels (267 ppi) |
| Screen-to-Body Ratio | 28.52% | 60.05% | 68.82% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | Stereo FM radio with RDS | FM radio |
| Games | Yes + downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 2 MP, 1600x1200 pixels | 5 MP, 2592x1944 pixels | 13 MP, 4128 x 3096 pixels |
| Flash | No | No | LED flash |
| Features | Auto focus, Sound & Shot, Best Shot, Best Photo, Geo-tagging, Face And Smile Detection | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection, HDR | |
| Video | Yes, QVGA | Yes, 720p@30fps | 1080p@30fps |
| Front Camera | No [Similar] | Yes, VGA [Similar] | 5 MP [Similar] |
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| GPRS | Class 10 (4+1/3+2 slots), 32 - 48 kbps | Yes | Yes |
| Edge | Class 10, 236.8 kbps | Yes | Yes |
| 3G | No | HSDPA 14.4 Mbps, HSUPA 5.76 Mbps | TD-SCDMA; LTE |
| Bluetooth | Yes, v2.0 with A2DP | Yes, v4.0 with A2DP | v4.0, A2DP, LE |
| Wi-Fi | Wi-Fi 802.11b/g | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, Wi-Fi hotspot |
| USB | Yes, microUSB | Yes, microUSB v2.0 | microUSB v2.0, USB On-the-go |
| GPS | No | Yes, with A-GPS support and GLONASS | Yes, with A-GPS, GLONASS |
| Browser | HTML | HTML5 | HTML5 |
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| Internal | 256 MB | 4 GB ROM, 512 MB RAM | 8 GB, 2 GB RAM |
| Expandable Storage | microSD, up to 32GB | 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-Ion | Li-Ion Battery | Li-Po Battery |
| Capacity | 1150 mAh | 1500 mAh | 3200 mAh |
| Stand by | Up to 408 h | - | Up to 775 h (3G) |
| Talk Time | Up to 4 h 30 min | - | Up to 38 h (2G) Up to 14 h (3G) |
