| HTC J Butterfly HTL21 |
| Manufacture | HTC |
| Model | J Butterfly HTL21 |
| Form factor | Block |
| Weight | 140 gram |
| Dimensions (HxWxD) | 143 x 71 x 9.1 |
| Operating System | Android |
| Networks | 3G - CDMA2000 1xEV-DO |
| 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 | 4.0 |
| DLNA | |
| GPS | |
| Glonass | |
| ANT+ | |
| IrDA | |
| NFC | |
| 3.5 mm audio connector | |
| Camera | |
| Camera resolution | 8 megapixel |
| Image Stabilization | |
| BSI sensor | |
| Camera Flash/Light | |
| Flash type | LED |
| Video recording | |
| Video capture resolution | 1080p |
| Second Camera | 2.1 megapixel |
| Display size | 5 inches |
| Touchscreen | |
| Colour display | |
| Number of colours | 16777216 |
| Display width | 1080 |
| Display height | 1920 |
| PPI | 440.58 |
| Second Display | NA |
| CPU | 1.5 GHz quad-core, Qualcomm Snapdragon S4 APQ8064 - MDM9615 |
| GPU | NA |
| Memory | 2 GB RAM. 16 GB internal storage |
| Micro SIM | |
| Dual SIM | |
| MP3 | |
| Ringtones / Music file format | MP3, AAC, AAC+, eAAC+, WMA, WAV |
| Java | |
| Games | Yes, downloadable |
| FM Radio | |
| Battery | 2020 |
| Standby time (h) | NA |
| Talktime (m) | NA |
| Wireless Charging | |
| Browser | Android HTML Webkit |
| Calendar | |
| Voicedialing | |
| IP Code | IPX5 |
| Predictive text | |
| RSS reader | |
| Voicememo | |
| PC Synchronization | |
| SyncML | |
| Website | Website |