Phone Comparison - Panasonic T31 vs Xiaomi Redmi Note 2 vs Xiaomi Mi 4i
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| Manufacturer | Panasonic | Xiaomi | Xiaomi |
| Announced | October 2013 | August 2015 | April 2015 |
| Status | Available - November 2013 | Available - August 2015 | Available - April 2015 |
| Price | - | Rs. 9,700 ($141.99) [Similarly Priced] | Rs. 8,999 ($132.34) [Similarly Priced] |
| Colors | Bluish Black, Pure White | Black, White, Yellow, Mint Green, Blue | Black, White, Blue, Yellow, Pink |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
122 x 64.4 x 11.95 mm (4.8 x 2.54 x 0.47 in) |
152 x 76 x 8.3 mm (5.98 x 2.99 x 0.33 in) |
138.1 x 69.6 x 7.8 mm (5.44 x 2.74 x 0.31 in) |
| Weight | 120 g (4.23 oz) | 160 g (5.64 oz) | 130 g (4.59 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100, TD-SCDMA | HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | - | LTE band 1(2100), 3(1800), 7(2600), 38(2600), 39(1900), 40(2300), 41(2500) | LTE |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v4.2.2 (Jelly Bean) with FOTA upgrade | Android OS, v5.0 (Lollipop) based MIUI 7 | Android OS, v5.0 (Lollipop) |
| Processor | Dual-core 1.3 GHz, MTK 6572 | Octa-core 2.0 GHz Cortex-A53, Mediatek MT6795 | Quad-core 1.7 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53, Qualcomm MSM8939 Snapdragon 615 |
| GPU | Mali-400 | PowerVR G6200 | Adreno 405 |
| RAM | 512 MB | 2 GB | 2 GB |
| Internal Memory | 4 GB (1.9 GB user memory) | 16 GB | 16/32 GB |
| External Memory | microSD, up to 32 GB | Yes | No |
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| Type | TFT capacitive touchscreen | IPS LCD capacitive touchscreen | IPS LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.0 inches | 5.5 inches | 5.0 inches |
| Resolution | 480 x 800 pixels (233 ppi) | 1080 x 1920 pixels (401 ppi) | 1080 x 1920 pixels (441 ppi) |
| Screen-to-Body Ratio | 58.08% | 72.02% | 71.57% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM Radio with Recording | FM radio | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 3.2 MP, 2048x1536 pixels | 13 MP, 4128 x 3096 pixels | 13 MP, 4128 x 3096 pixels |
| Flash | No | LED flash | LED flash |
| Features | Fixed Focus, Geo-tagging | Phase Detection Auto focus (PDAF), Geo-tagging, Touch Focus, Face/smile Detection, HDR | Auto focus, Geo-tagging, Touch Focus, Face/smile Detection, Panorama, HDR |
| Video | Yes, VGA@30fps | 1080p@30fps | 1080p@30fps |
| Front Camera | Yes, VGA [Similar] | 5 MP [Similar] | 5 MP [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | TD-SCDMA | HSPA, LTE |
| Bluetooth | Yes, v4.0 with A2DP | v4.0, A2DP, LE | v4.0, A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot | Wi-Fi 802.11 a/b/g/n, dual-band, hotspot |
| USB | Yes, microUSB v2.0 | microUSB v2.0, USB Host | microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 4 GB (1.9 GB user memory), 512 MB RAM | 16 GB, 2 GB RAM | 16/32 GB, 2 GB RAM |
| Expandable Storage | microSD, up to 32 GB | Yes | No |
| 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 | Li-Ion Battery | Li-Po Battery | Li-Po Battery |
| Capacity | 1300 mAh | 3060 mAh | 3120 mAh |
| Stand by | Up to 510 h (2G) Up to 400 h (3G) |
- | - |
| Talk Time | Up to 3 h 30 min (2G) Up to 9 h 30 min (3G) |
- | - |
