HTC U Ultra Dual SIM vs Asus Zenfone 3 Ultra ZU680KL
| Type | Touch | Touch |
| Dimensions | 162.41 x 79.79 x 7.99 mm | 186.40 x 93.90 x 6.80 mm |
| Weight | 170.00 g | 233.00 g |
| Display size | 5.70" | 6.80" |
| Display | Color / Super LCD 16M colors 1440 x 2560 px (5.70") 515 ppi | Color / IPS TFT 16M colors 1080 x 1920 px (6.80") 324 ppi |
| Display protection | Corning Gorilla Glass Buy screen protector
 | Corning Gorilla Glass Buy screen protector
|
| Additional display | Color / Super LCD 16M colors 1040 x 160 px (2.05") |  |
| Protection of the secondary display | | |
| Talk time (max.) | 3G: 1560 min. (26.0 h) 4G: 1560 min. (26.0 h) |  |
| Stand-by (max.) | 3G: 312 h. (13.0 days) 4G: 312 h. (13.0 days) | |
| Standard battery | Li-Po 3000 mAhBuy powerbank
| Li-Ion 4600 mAhBuy powerbank
|
| Quick battery charging | Quick Charge 3.0 | Quick Charge 3.0 |
| Wireless battery charging | | |
| Internal memory | 64 GB, 128 GB | 32 GB, 64 GB, 128 GB |
| RAM memory | 4 GB | 3 GB, 4 GB |
| Memory cards |  microSD, microSDHC, microSDXC up to 2000 GBBuy memory card | microSD, microSDHC, microSDXC up to 200 GBBuy memory card |
| Operating system | Android 7.0 Nougat | Android 6.0 Marshmallow |
| Interface | Sense | Zen UI 3.0 |
| Processor | Qualcomm Snapdragon 821 8996 | Qualcomm Snapdragon 652 8976 |
| Processor clock | 2150 MHz | 1800 MHz |
| GPU | Adreno 530 @653 MHz | Adreno 510 |
| Touchscreen | | |
| DualSIM | | |
| SIM cards standard | DualSIM(nanoSIM, nanoSIM) | DualSIM(microSIM, microSIM) |
| DualSIM mode | dual standby | dual standby |
| Hybrid DualSIM | nanoSIM, microSD | |
| Announced | 1Q 2017 | 2Q 2016 |
| Other names | - | - |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 850 900 1700 1900 2100 | 850 900 1900 2100 |
| LTE standard | FDD LTE: 2600, 2100, 1900, 1800, 1700, 900, 850, 800, 700 TDD LTE: 2600, 2500, 2300, 1900 | FDD LTE: 2600, 2100, 1900, 1800, 1700, 900, 850, 800, 700 TDD LTE: 2600, 2500, 2300 |
| CDMA | | |
| Standard TD-SCDMA | | 1900 2000 |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Photo sensor model | | Sony IMX318 |
| Photo matrix | 12 Mpx | 23 Mpx |
| Resolution | | 5488x4112 px |
| Optical zoom | | |
| Flash | 2x LED | 2x LED |
| Dual-colour LED flash | 1+1 | 1+1 |
| Video resolution | 3840x2160 px | 3840x2160 px |
| Video formats | H.263, H.264, MPEG4 - 30 fps | H.263, H.264, MPEG4 |
| Additional | AF, Laser AF, OIS, f/1.8 | AF, Laser AF, EIS, OIS, f/2.0 |
CAMERAS - FRONT
| First camera | | |
| Photo matrix | 16 Mpx | 8 Mpx |
| Resolution | | 3264x2448 px |
| Optical zoom | | |
| Flash | LED | |
| Dual-colour LED flash | | |
| Video resolution | 1920x1080 px | 1920x1080 px |
| Video formats | H.263, H.264, MPEG4 - 30 fps | H.263, H.264, MPEG4 |
| Additional | FF | AF, f/2.0 |
SENSORS
| Accelerometer | | |
| Proximity | | |
| Light | | |
| Magnetometer | | |
| Gyroscope | | |
| Barometer | | |
| Altimeter | | |
| Gravity | | |
| Hall-effect | | |
| Iris scanner | | |
| Fingerprint scanner | | |
| Thermometer | | |
| Hygrometer | | |
Data transfer
| xHTML | | |
| WAP | v2.0 | v2.0 |
| HSCSD | | |
| HSDPA | 42.20 Mbit/s | 42.20 Mbit/s |
| HSUPA | 5.76 Mbit/s | 5.76 Mbit/s |
| HSPA | | |
| HSPA+ | | |
| LTE DL | 603.00 Mbit/s | - |
| LTE UP | 51.00 Mbit/s | 51.00 Mbit/s |
| WIMAX+ | | |
| GPRS | | |
| EDGE | | |
| Bluetooth | v4.2 | v4.2 |
| A2DP Profile | | |
| HDMI | | |
| WiFi | v802.11 a/b/g/n/ac | v802.11 a/b/g/n/ac |
| WiFi frequencies | 2,4 GHz; 5 GHz | 2,4 GHz; 5 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | v3.1 Type-C | v2.0 Type-C |
| GPS | | |
| A-GPS | | |
| GLONASS | | |
| Beidou | | |
| NFC | | |
COMMUNICATION AND MESSAGING
| Call waiting | | |
| Conferency | | |
| Call forwarding | | |
| Push To Talk | | |
| Instant Messenger | | |
| SMS | | |
| EMS | | |
| MMS | | |
| Dictionary | T9 | T9 |
| Swype | | |
| e-mail client | POP3, IMAP4, SMTP | POP3, IMAP4, SMTP |
| Hardware QWERTY keyboard | | |
| RSS Reader | | |
Multimedia
| Radio | | |
| MP3 | | |
| Stereo speakers | | 2 |
| Audio Jack | | 3.5 mm |
| HD Voice | | |
| Sound formats | AAC, AAC+, AMR, FLAC, MKA, OGG, WAV, eAAC+ | AAC, AAC+, AMR, WAV, eAAC+ |
| Polyphony | | |
| Video ringtone | | |
| Ring composer | | |
| Games | | |
| Java | ART | ART |
| Videophone | | |
| DVB-H television | | |
| TV-Out | | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | | |
| Stopwatch | | |
| Alarm | | |
| Calculator | | |
| Currency converter | | |
| Organizer | | |
| Calendar | | |
| Flight mode | | |
| SyncML | | |
| Data and fax | | |
| Screensaver | | |
| Themes | | |
| Interchangeable covers | | |
| Voice dial | | |
| Speakerphone | | |
| Recorder | | |
| Vibrations | | |