In depth comparison and review of ASUS ZenFone Zoom (ZX551ML) and HTC U Ultra. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.
| DESIGN AND DIMENSIONS | ASUS ZenFone Zoom (ZX551ML) | HTC U Ultra |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | ZX551ML | - | |
| Form Factor | Touch | Touch | |
| Height | 158.9 mm | 145.99 mm | ASUS ZenFone Zoom (ZX551ML) has greater height than HTC U Ultra. |
| Width | 78.8 mm | 72.9 mm | ASUS ZenFone Zoom (ZX551ML) has greater width than HTC U Ultra. |
| Depth | 12 mm | 7.99 mm | HTC U Ultra is narrower than ASUS ZenFone Zoom (ZX551ML). |
| Weight | 185 g | 145 g | HTC U Ultra is lighter than ASUS ZenFone Zoom (ZX551ML). |
| Body Colour | Ceramic white | Pure black | Brilliant black | |
| Body Material | - | Metal | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.432 W/kg (body), 0.343 W/kg (head) | 0.48 W/kg (body), 0.4 W/kg (head) | |
| Connector Type | Headset jack - mini-phone 3.5mm Micro-USB - 5 pin Micro-USB Type B |
Headset jack - mini-phone 3.5mm USB Type-C - 24 pin USB-C |
|
| SIM Card Type (Size) | Micro SIM | Nano SIM | |
| SIM Card Qty | - | Single-SIM |
| DISPLAY | ASUS ZenFone Zoom (ZX551ML) | HTC U Ultra |
|---|
| Display Type | LCD display | LCD display | |
|---|---|---|---|
| Display Technology | IPS | Super LCD | |
| Screen Size (Display Size) | 5.5" | 5.2" | ASUS ZenFone Zoom (ZX551ML) has larger screen size than HTC U Ultra. |
| Screen Resolution (Display Resolution) | 1920 x 1080 pixels | 1920 x 1080 pixels | Both phones have the same screen resolution. |
| Display Format | Full HD | Full HD | |
| Pixel Density | 401 ppi | 428 ppi | HTC U Ultra has better pixel density than ASUS ZenFone Zoom (ZX551ML). |
| Colour Depth | 16.7 million colours | - | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 4 (scratch resistant glass) | Corning Gorilla Glass (scratch resistant glass) |
| PROCESSOR | ASUS ZenFone Zoom (ZX551ML) | HTC U Ultra |
|---|
| Processor Type (CPU) | Intel Atom | MediaTek Helio P10 | |
|---|---|---|---|
| Processor Number | Z3590 | - | |
| Clock Speed | 2.5 GHz | 2 GHz | ASUS ZenFone Zoom (ZX551ML) has higher clock speed than HTC U Ultra. |
| Processor Core Qty | Quad-core | 8-core | HTC U Ultra has higher processor core quantity than ASUS ZenFone Zoom (ZX551ML). |
| 64-bit Architecture | - | Yes | HTC U Ultra has 64-bit architecture. |
| Graphics System (GPU) | PowerVR G6430 | - |
| MEMORY | ASUS ZenFone Zoom (ZX551ML) | HTC U Ultra |
|---|
| RAM | 4 GB | 3 GB | ASUS ZenFone Zoom (ZX551ML) has more RAM than HTC U Ultra. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 32 GB | 32 GB | Both phones have the same internal memory capacity. |
| User Memory | - | 22.8 GB | |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 128 GB | microSDHC, microSDXC - up to 2 TB |
| CAMERA | ASUS ZenFone Zoom (ZX551ML) | HTC U Ultra |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution | 13 Megapixel | 16 Megapixel | HTC U Ultra has better camera resolution than ASUS ZenFone Zoom (ZX551ML). |
| Sensor Type | - | BSI | |
| Lens Aperture | F/2.7-4.8 | F/2.0 | HTC U Ultra has better lens aperture than ASUS ZenFone Zoom (ZX551ML). |
| Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | Both phones have optical image stabilization. |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | Yes | Yes | |
| Minimum Focal Length (Focal Distance) | - | 28 mm | |
| Digital Zoom | 3x | - | |
| HDR Mode | Auto HDR mode | Auto HDR mode | |
| Camera Modes | Panorama | Burst mode, Panorama, Pro mode, Continuous shot, HYPERLAPSE, RAW mode | |
| Face Recognition (Face ID) | Face detection | Face detection | Both phones have face detection. |
| Light Source | Dual LED flash | Dual LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) | 1920 x 1080 (1080p) at 30 fps | |
| Camera Features (Functions) | - | Phase Detect Auto-Focus (PDAF), Video Pic |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 5 Megapixel | 16 Megapixel | HTC U Ultra has better front camera resolution than ASUS ZenFone Zoom (ZX551ML). |
| Sensor Type (Front) | - | BSI | |
| Lens Type (Front) | - | Wide-angle lens | |
| Lens Aperture (Front) | F/2.0 | F/2.0 | Both phones have the same front camera lens aperture. |
| Focus Adjustment | - | Automatic | |
| Min Focal Length (Front) | - | 26.5 mm | |
| Special Effects (Front) | - | Live make-up | |
| HDR Mode (Front) | - | Auto HDR mode | |
| Camera Modes (Front) | - | Tap to focus, selfie panorama, Auto selfie (smile selfie, still selfie) | |
| Video Resolutions (Front) | - | 1920 x 1080 (1080p) | |
| Camera Features (Front) | - | HTC UltraPixel Camera, Voice selfie, Self timer up to 10 seconds |
| BATTERY AND CHARGING | ASUS ZenFone Zoom (ZX551ML) | HTC U Ultra |
|---|
| Battery Capacity (Battery Size) | 3000 mAh | 2500 mAh | ASUS ZenFone Zoom (ZX551ML) has larger battery capacity than HTC U Ultra. |
|---|---|---|---|
| Standby Time | - | 427.54 hours | |
| Talk Time | - | 912 minutes | |
| Run Time Details | - | Talk (3G): up to 912 min Standby (3G): up to 427.54 hrs |
|
| Battery Technology | Lithium polymer | - |
| CELLULAR | ASUS ZenFone Zoom (ZX551ML) | HTC U Ultra |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | Android 5.0 (Lollipop) | Android 6.0 (Marshmallow) | |
| User Interface | ASUS ZenUI 2.0 | HTC Sense | |
| Intelligent Assistant | - | HTC Sense Companion | |
| Navigation | A-GPS, GLONASS, BeiDou | GPS, GLONASS |
| COMMUNICATIONS | ASUS ZenFone Zoom (ZX551ML) | HTC U Ultra |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE Advanced, VoLTE, FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | 850 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 4G LTE Band | Band 1, Band 2, Band 3, Band 5, Band 7, Band 8, Band 9, Band 18, Band 19, Band 28 | Band 1, Band 3, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40 | |
| 4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 1800, FDD 800 lower, FDD 800 upper, FDD 700 APT | FDD 2100, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | IEEE 802.11a/b/g/n/ac | |
| Bluetooth | Bluetooth 4.0 | Bluetooth 4.2 | |
| Bluetooth Profiles | A2DP | - | |
| NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | SMS, MMS |
| MEDIA | ASUS ZenFone Zoom (ZX551ML) | HTC U Ultra |
|---|
| Supported Digital Audio Standards | - | WAV, AAC, MP3, FLAC, OGG, M4A, MID | |
|---|---|---|---|
| Supported Digital Video Standards | - | MKV, MPEG-4, 3GP, TS, WebM | |
| Sound Enhancements | - | HTC BoomSound Hi-Fi Edition |
| FEATURES | ASUS ZenFone Zoom (ZX551ML) | HTC U Ultra |
|---|
| Phone Functions | Speakerphone, call timer, conference call, vibrating alert | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
|---|---|---|---|
| Sensors | Accelerometer, proximity sensor, digital compass, gyro sensor | Ambient light sensor, proximity sensor, digital compass, magnetometer, gyro sensor, G-sensor | |
| Security Devices | - | Fingerprint reader | |
| Additional Phone Features | Multitasking | AirPlay wireless streaming, sharing media via DLNA, Wi-Fi Miracast, Noise Cancellation Technology, Flip to Mute function, Power Saving Mode, Wi-Fi Calling, Pocket mode, Hi-Res Audio, Motion Launch, Android Sensor Hub, HTC Connect, Extreme power saving mode, Hi-Res audio stereo recording, HTC Usonic, Quiet ring on pick up |
| OTHERS | ASUS ZenFone Zoom (ZX551ML) | HTC U Ultra |
|---|
| Included Accessories | Power adapter | Power adapter |
|---|
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