In depth comparison and review of HTC Desire 820 and ASUS ZenFone Zoom (ZX551ML). 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 | HTC Desire 820 | ASUS ZenFone Zoom (ZX551ML) |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | ZX551ML | |
| Form Factor | Touch | Touch | |
| Height | 157.7 mm | 158.9 mm | ASUS ZenFone Zoom (ZX551ML) has greater height than HTC Desire 820. |
| Width | 78.74 mm | 78.8 mm | ASUS ZenFone Zoom (ZX551ML) has greater width than HTC Desire 820. |
| Depth | 7.74 mm | 12 mm | HTC Desire 820 is narrower than HTC Desire 820. |
| Weight | 155 g | 185 g | HTC Desire 820 is lighter than HTC Desire 820. |
| Body Colour | Tuxedo grey | Marble white | Ceramic white | Pure black | |
| Body Material | Polycarbonate | - | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.323 W/kg (body), 0.373 W/kg (head) | 0.432 W/kg (body), 0.343 W/kg (head) | |
| Integrated Components | FM radio | - | |
| Connector Type | Headset jack - mini-phone 3.5mm Micro-USB - 5 pin Micro-USB Type B |
Headset jack - mini-phone 3.5mm Micro-USB - 5 pin Micro-USB Type B |
|
| SIM Card Type (Size) | Nano SIM | Micro SIM |
| DISPLAY | HTC Desire 820 | ASUS ZenFone Zoom (ZX551ML) |
|---|
| Display Type | LCD display | LCD display | |
|---|---|---|---|
| Display Technology | Super LCD 2 | IPS | |
| Screen Size (Display Size) | 5.5" | 5.5" | Both phones have the same screen size. |
| Screen Resolution (Display Resolution) | 1280 x 720 pixels | 1920 x 1080 pixels | ASUS ZenFone Zoom (ZX551ML) has better screen resolution than HTC Desire 820. |
| Display Format | HD | Full HD | |
| Pixel Density | 267 ppi | 401 ppi | ASUS ZenFone Zoom (ZX551ML) has better pixel density than HTC Desire 820. |
| Colour Depth | 16.7 million colours | 16.7 million colours | Both phones have the same color depth. |
| Display Protection (Screen Protector) | Corning Gorilla Glass 3 (scratch resistant glass) | Corning Gorilla Glass 4 (scratch resistant glass) |
| PROCESSOR | HTC Desire 820 | ASUS ZenFone Zoom (ZX551ML) |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 615 | Intel Atom | |
|---|---|---|---|
| Processor Number | - | Z3590 | |
| Clock Speed | - | 2.5 GHz | |
| Processor Core Qty | 8-core | Quad-core | HTC Desire 820 has higher processor core quantity than ASUS ZenFone Zoom (ZX551ML). |
| Graphics System (GPU) | Qualcomm ADRENO 405 | PowerVR G6430 |
| MEMORY | HTC Desire 820 | ASUS ZenFone Zoom (ZX551ML) |
|---|
| RAM | 2 GB | 4 GB | ASUS ZenFone Zoom (ZX551ML) has more RAM than HTC Desire 820. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 16 GB | 32 GB | ASUS ZenFone Zoom (ZX551ML) has more internal memory than HTC Desire 820. |
| User Memory | 11.2 GB | - | |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 128 GB | microSDHC, microSDXC - up to 128 GB |
| CAMERA | HTC Desire 820 | ASUS ZenFone Zoom (ZX551ML) |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution | 13 Megapixel | 13 Megapixel | Both phones have the same camera resolution. |
| Sensor Type | BSI-CMOS | - | |
| Lens Aperture | F/2.2 | F/2.7-4.8 | HTC Desire 820 has better lens aperture than HTC Desire 820. |
| Optical Image Stabiliser (OIS) | - | Optical Image Stabiliser (OIS) | ASUS ZenFone Zoom (ZX551ML) has optical stabilisation. |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | - | Yes | |
| Minimum Focal Length (Focal Distance) | 28 mm | - | |
| Digital Zoom | - | 3x | |
| HDR Mode | Auto HDR mode | Auto HDR mode | |
| Camera Modes | Burst mode | Panorama | |
| Face Recognition (Face ID) | Face detection | Face detection | Both phones have face detection. |
| Light Source | LED light | Dual LED flash | |
| Still Image Resolutions | 4160 x 3120 | - | |
| Video Resolutions | 1920 x 1080 (1080p) | 1920 x 1080 (1080p) | |
| Camera Features (Functions) | Auto selfie, Photo Booth feature, Live Makeup, Split Capture | - |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 8 Megapixel | 5 Megapixel | HTC Desire 820 has better front camera resolution than ASUS ZenFone Zoom (ZX551ML). |
| Sensor Type (Front) | BSI-CMOS | - | |
| Lens Aperture (Front) | - | F/2.0 | |
| Special Effects (Front) | Face fusion | - | |
| Video Resolutions (Front) | 1920 x 1080 (1080p) | - |
| BATTERY AND CHARGING | HTC Desire 820 | ASUS ZenFone Zoom (ZX551ML) |
|---|
| Battery Capacity (Battery Size) | 2600 mAh | 3000 mAh | ASUS ZenFone Zoom (ZX551ML) has larger battery capacity than HTC Desire 820. |
|---|---|---|---|
| Standby Time | 455 hours | - | |
| Talk Time | 1068 minutes | - | |
| Run Time Details | Talk (WCDMA): up to 1068 min Standby (WCDMA): up to 455 hrs |
- | |
| Battery Technology | Lithium polymer | Lithium polymer |
| CELLULAR | HTC Desire 820 | ASUS ZenFone Zoom (ZX551ML) |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | Android 4.4 (KitKat) | Android 5.0 (Lollipop) | |
| User Interface | HTC Sense | ASUS ZenUI 2.0 | |
| Navigation | A-GPS, GLONASS | A-GPS, GLONASS, BeiDou |
| COMMUNICATIONS | HTC Desire 820 | ASUS ZenFone Zoom (ZX551ML) |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 1800 GSM, 1900 GSM | |
| 4G LTE Band | Band 3, Band 7, Band 8, Band 20 | Band 1, Band 2, Band 3, Band 5, Band 7, Band 8, Band 9, Band 18, Band 19, Band 28 | |
| 4G LTE Frequency | FDD 1800+, FDD 2600, FDD 900, FDD 800 DD | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 1800, FDD 800 lower, FDD 800 upper, FDD 700 APT | |
| Wireless Interface | IEEE 802.11a/b/g/n | IEEE 802.11a/b/g/n/ac | |
| Bluetooth | Bluetooth 4.0 | Bluetooth 4.0 | |
| Bluetooth Profiles | A2DP | A2DP | |
| NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
| Communication Features | Mobile Email client, Internet browser | - | |
| Messaging Services | SMS, MMS | SMS, MMS |
| MEDIA | HTC Desire 820 | ASUS ZenFone Zoom (ZX551ML) |
|---|
| Supported Digital Audio Standards | WAV, AAC, AMR, MP3, OGG, MIDI, M4A, WMA 9 | - | |
|---|---|---|---|
| Supported Digital Video Standards | AVI, MPEG-4, 3GP, H.264, H.263, WMV9, 3G2 | - | |
| Sound Enhancements | HTC BoomSound | - |
| FEATURES | HTC Desire 820 | ASUS ZenFone Zoom (ZX551ML) |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, voice dialing, vibrating alert | Speakerphone, call timer, conference call, vibrating alert | |
|---|---|---|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor | Accelerometer, proximity sensor, digital compass, gyro sensor | |
| Personal Information Management | Calendar, synchronization with PC, calculator, reminder, alarm clock | - | |
| Additional Phone Features | DLNA Certified, sharing media via DLNA, Wi-Fi Miracast, HTC BlinkFeed, HTC Sense Voice | Multitasking |
| OTHERS | HTC Desire 820 | ASUS ZenFone Zoom (ZX551ML) |
|---|
| Included Accessories | Power adapter | Power adapter |
|---|
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