| Local Name | Lumia 820 |
| Technology | GSM / HSPA / LTE |
| 4G Bands | LTE band 1(2100), 3(1800), 7(2600), 8(900), 20(800) |
| 3G Bands | HSDPA 850 / 900 / 1900 / 2100 |
| 2G Bands | GSM 850 / 900 / 1800 / 1900 |
| Speed | HSPA 42.2/5.76 Mbps, LTE Cat3 100/50 Mbps |
| GPRS | Class 12 |
| EDGE | Class 12 |
| Announced | 2012, September |
| Status | Available. Released 2012, November |
| Dimensions | 123.8 x 68.5 x 9.9 mm, 83.5 cc (4.87 x 2.70 x 0.39 in) |
| Weight | 160 g (5.64 oz) |
| SIM | Micro-SIM |
| Display Type | AMOLED capacitive touchscreen, 16M colors |
| Screen Size | 4.3 inches (~62.1% screen-to-body ratio) |
| Resolution | 480 x 800 pixels (~217 ppi pixel density) |
| Mulitouch | Yes | Nokia ClearBlack display |
| OS | Microsoft Windows Phone 8, upgradeable to v8.1 |
| Chipset | Qualcomm MSM8960 Snapdragon S4 Plus |
| CPU | Dual-core 1.5 GHz Krait |
| GPU | Adreno 225 |
| Card Slot | microSD, up to 64 GB |
| Internal Memory | 8 GB, 1 GB RAM |
| Primary Camera | 8 MP, 3264 x 2448 pixels, Carl Zeiss optics, autofocus, dual-LED flash |
| Camera Features | Geo-tagging, touch focus |
| Video | 1080p@30fps |
| Secondary Camera | VGA |
| Alert Types | Vibration; MP3, WAV ringtones |
| Loudspeaker | Yes |
| 3.5mm Jack | Yes |
| Sound | Dolby Headphone |
| WLAN | Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct |
| Bluetooth | v4.0, A2DP, EDR, LE/ apt-X after WP8 Denim update |
| GPS | Yes, with A-GPS, GLONASS |
| NFC | Yes |
| Radio | FM radio |
| USB | microUSB v2.0 |
| Sensors | Accelerometer, gyro, proximity, compass |
| Messaging | SMS (threaded view), MMS, Email, Push Email, IM |
| Browser | HTML5 |
| Java | No |
| Features Summary | Active noise cancellation with dedicated mic, OneDrive (15 GB cloud storage), MP3/WAV/eAAC+/WMA player, MP4/H.264/WMV player, Document viewer, Video/photo editor |
| Battery | Li-Ion 1650 mAh battery (BP-5T) |
| Stand By | Up to 330 h (2G) / Up to 330 h (3G) |
| Talk Time | Up to 14 h (2G) / Up to 8 h (3G) |
| Music Play | Up to 55 h |
| Colors | Black, Gray, Red, Yellow, White, Blue, Violet |
| SAR US | 1.37 W/kg (head) 0.71 W/kg (body) |
| SAR EU | 0.79 W/kg (head) |
