Nokia Lumia 830 vs Microsoft Lumia 640 LTE
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| PHONES | ||
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| Phone Names | Nokia Lumia 830 | Microsoft Lumia 640 LTE |
| Network | ||
|---|---|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G bands | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G bands | 1, 3, 7, 8, 20 | 1, 3, 7, 8, 20 |
| Speed | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Technology | GSM / HSPA / LTE | GSM / HSPA / LTE |
| 2, 4, 5, 17 - AT&T | 1, 2, 4, 5, 7, 12, 17 - T-Mobile | |
| Launch | ||
|---|---|---|
| Announced | 2014, September. Released 2014, September | 2015, March. Released 2015, April |
| Status | Discontinued | Discontinued |
| Body | ||
|---|---|---|
| Dimensions | 139.4 x 70.7 x 8.5 mm (5.49 x 2.78 x 0.33 in) | 141.3 x 72.2 x 8.8 mm (5.56 x 2.84 x 0.35 in) |
| SIM | Nano-SIM | Micro-SIM |
| Weight | 150 g (5.29 oz) | 145 g (5.11 oz) |
| Display | ||
|---|---|---|
| Protection | Corning Gorilla Glass 3 | Corning Gorilla Glass 3 |
| Resolution | 720 x 1280 pixels, 16:9 ratio (~294 ppi density) | 720 x 1280 pixels, 16:9 ratio (~294 ppi density) |
| Size | 5.0 inches, 68.9 cm2 (~69.9% screen-to-body ratio) | 5.0 inches, 68.9 cm2 (~67.6% screen-to-body ratio) |
| Type | IPS LCD | IPS LCD |
| ClearBlack display | ClearBlack display | |
| Platform | ||
|---|---|---|
| CPU | Quad-core 1.2 GHz Cortex-A7 | Quad-core 1.2 GHz Cortex-A7 |
| Chipset | Qualcomm Snapdragon 400 (28 nm) | Qualcomm MSM8926 Snapdragon 400 (28 nm) |
| GPU | Adreno 305 | Adreno 305 |
| OS | Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10 | Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10 |
| Memory | ||
|---|---|---|
| Card slot | microSDXC (dedicated slot) | microSDXC (dedicated slot) |
| Internal | 16GB 1GB RAM | 8GB 1GB RAM |
| eMMC 4.5 | eMMC 4.5 | |
| Main Camera | ||
|---|---|---|
| Features | Zeiss optics, LED flash, panorama | LED flash |
| Single | 10 MP, f/2.2, 26mm (wide), 1/3.4", AF, OIS | 8 MP, f/2.2, 28mm (wide), 1/4.0", AF |
| Video | 1080p@30fps, stereo sound rec. | 1080p@30fps |
| Selfie camera | ||
|---|---|---|
| Single | 0.9 MP | 1 MP |
| Video | 720p | 720p |
| Sound | ||
|---|---|---|
| 3.5mm jack | Yes | Yes |
| 35mm jack | Yes | Yes |
| Loudspeaker | Yes | Yes |
| Comms | ||
|---|---|---|
| Bluetooth | 4.0, A2DP, EDR, LE, aptX | 4.0, A2DP |
| NFC | Yes | Yes |
| Positioning | GPS, GLONASS, BDS | GPS, GLONASS, BDS |
| Radio | FM radio | FM radio |
| USB | microUSB 2.0 | microUSB 2.0 |
| WLAN | Wi-Fi 802.11 a/b/g/n, dual-band, DLNA, hotspot | Wi-Fi 802.11 b/g/n, DLNA, hotspot |
| Features | ||
|---|---|---|
| Sensors | Accelerometer, gyro, proximity, compass | Accelerometer, proximity, compass |
| Battery | ||
|---|---|---|
| Charging | Wireless (Qi) | - |
| Music play | Up to 78 h | - |
| Stand-by | Up to 528 h | Up to 864 h (2G) / Up to 864 h (3G) |
| Talk time | Up to 12 h 54 min (2G) / Up to 14 h 48 min (3G) | Up to 26 h 30 min (2G) / Up to 17 h 30 min (3G) |
| Type | Li-Ion 2200 mAh, removable (BV-L4A) | Li-Ion 2500 mAh, removable |
| Misc | ||
|---|---|---|
| Colors | Orange, green, white, black, gold | Glossy cyan, Orange, White, Matte black |
| Price | About 330 EUR | About 120 EUR |
| SAR | 0.87 W/kg (head) 0.83 W/kg (body) | - |
| SAR EU | 0.46 W/kg (head) 0.59 W/kg (body) | - |
| Tests | ||
|---|---|---|
| Audio quality | Noise -89.7dB / Crosstalk -91.6dB | Noise -93.1dB / Crosstalk -93.2dB |
| Battery life | Endurance rating 68h | Endurance rating 76h |
| Camera | Photo / Video | Photo / Video |
| Display | Contrast ratio: 1078 (nominal), 1887 (sunlight) | Contrast ratio: 1034 (nominal), 2.563 (sunlight) |
| Loudspeaker | Voice 65dB / Noise 66dB / Ring 78dB | Voice 70dB / Noise 65dB / Ring 75dB |
| OUR TESTS | ||
|---|---|---|
| Audio quality | Noise -89.7dB / Crosstalk -91.6dB | Noise -93.1dB / Crosstalk -93.2dB |
| Battery (old) | Endurance rating 68h | Endurance rating 76h |
| Camera | Photo / Video | Photo / Video |
| Display | Contrast ratio: 1078 (nominal), 1887 (sunlight) | Contrast ratio: 1034 (nominal), 2.563 (sunlight) |
| Loudspeaker | Voice 65dB / Noise 66dB / Ring 78dB | Voice 70dB / Noise 65dB / Ring 75dB |