| HTC Windows Phone 8X | Nokia E66 |
| Manufacture | HTC | Nokia |
| Model | Windows Phone 8X | E66 |
| Form factor | Block | Slider |
| Weight | 130 gram | 121.00 |
| Dimensions (HxWxD) | 132.35 x 66.2 x 10.12 | 108.00 x 50.00 x 14.00 |
| Operating System | Windows Phone 8 | Symbian S60 |
| Networks | 2G - 850/900/1800/1900 3G - 850/900/1900/2100 | 2G - 850/900/1800/1900 3G - 900/2100 |
| HSCSD |  | |
| GPRS |  | |
| EDGE | | |
| UMTS | | |
| HSDPA | | |
| HSPA+ | | |
| WiMAX | | |
| LTE (4G light) | | |
| WLAN / Wi-Fi | | |
| Wi-Fi Hotspot | | |
| Wi-Fi Direct | | |
| SMS | | |
| MMS | | |
| | |
| HDMI out | | |
| USB port | | |
| MHL | | |
| Bluetooth | | |
| Bluetooth version | 2.1 | NA |
| DLNA | | |
| GPS | | |
| Glonass | | |
| ANT+ | | |
| IrDA | | |
| NFC | | |
| 3.5 mm audio connector | | |
| Camera | | |
| Camera resolution | 8 megapixel, auto focus, f/2.0, 28mm lens | 3.2 megapixel, autofocus, 4x digital zoom |
| Image Stabilization | | |
| BSI sensor | | |
| Camera Flash/Light | | |
| Flash type | LED | NA |
| Video recording | | |
| Video capture resolution | 1080p | NA |
| Second Camera | 2.1 megapixel, 1080p video capture, f/2.0 | QCIF (128 x 96 pixels) |
| Display size | 4.3 inches | 2.40 |
| Touchscreen | | |
| Colour display | | |
| Number of colours | 16777216 | 16700000 |
| Display width | 720 | 240 |
| Display height | 1280 | 320 |
| PPI | 341.54 | 166.67 |
| Second Display | NA | NA |
| CPU | 1.5 GHz dual-core Qualcomm Snapdragon S4 MSM8960 | NA |
| GPU | Adreno 225 | NA |
| Memory | 1 GB RAM. 16 GB internal storage | 110 MB. Expandable up to 8GB with microSD card |
| Micro SIM | | |
| Dual SIM | | |
| MP3 | | |
| Ringtones / Music file format | NA | Polyphonic, MP3, AAC, AAC+, AMR-NB, AMR- |
| Java | | |
| Games | Yes, downloadable | NA |
| FM Radio | | |
| Battery | 1800 mAh | 1000 mAh |
| Standby time (h) | NA | 264 |
| Talktime (m) | NA | 450 |
| Wireless Charging | | |
| Browser | Internet Explorer 10 | 2.0 XHTML |
| Calendar | | |
| Voicedialing | | |
| IP Code | NA | NA |
| Predictive text | | |
| RSS reader | | |
| Voicememo | | |
| PC Synchronization | | |
| SyncML | | |
| Website | Website | Website |