Comparison between:
- Firefly Aurii Envy
- ZUK Z1
- Xiaomi Redmi Note 4X
Brand and model
Information about the brand, model and model alias (if any) of a specific device.
| Firefly Aurii Envy | ZUK Z1 | Xiaomi Redmi Note 4X | |
 |  |  | |
| Model alias | - | - | Redmi Note 4X Hatsune Miku Special Edition Red Rice Note 4X |
Design
Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.
| Width | 77.85 mm 7.785 cm 0.255 ft 3.065 in | 77.3 mm 7.73 cm 0.254 ft 3.043 in | 76 mm 7.6 cm 0.249 ft 2.992 in |
| Height | 153.5 mm 15.35 cm 0.504 ft 6.043 in | 155.7 mm 15.57 cm 0.511 ft 6.13 in | 151 mm 15.1 cm 0.495 ft 5.945 in |
| Thickness | 8.6 mm 0.86 cm 0.028 ft 0.339 in | 8.9 mm 0.89 cm 0.029 ft 0.35 in | 8.45 mm 0.845 cm 0.028 ft 0.333 in |
| Weight | 156 g 0.34 lbs 5.5 oz | 175 g 0.39 lbs 6.17 oz | 165 g 0.36 lbs 5.82 oz |
| Volume | 102.77 cm³ 6.24 in³ | 107.12 cm³ 6.51 in³ | 96.97 cm³ 5.89 in³ |
| Colors | Gold | White Gray | Pink Green Champagne Black Silver |
| Body materials | Metal Glass | Glass Aluminium alloy | Aluminium alloy Plastic |
SIM card
The Subscriber Identity Module (SIM) is used in mobile devices for storing data authenticating the subscribers of mobile services.
| SIM card type | Micro-SIM / microSD Micro-SIM | Nano-SIM | Micro-SIM Nano-SIM / microSD |
| Number of SIM cards | 2 | 2 | 2 |
Networks
A mobile (cellular) network is a radio system, which allows a large number of mobile devices to communicate with each other.
| GSM | GSM 850 MHz GSM 900 MHz GSM 1800 MHz GSM 1900 MHz | GSM 850 MHz GSM 900 MHz GSM 1800 MHz GSM 1900 MHz | GSM 850 MHz GSM 900 MHz GSM 1800 MHz GSM 1900 MHz |
| CDMA | - | CDMA 800 MHz | CDMA 800 MHz |
| W-CDMA | W-CDMA 900 MHz W-CDMA 2100 MHz | W-CDMA 850 MHz W-CDMA 900 MHz W-CDMA 1900 MHz W-CDMA 2100 MHz | W-CDMA 850 MHz W-CDMA 900 MHz W-CDMA 1900 MHz W-CDMA 2100 MHz |
| TD-SCDMA | - | TD-SCDMA 1880-1920 MHz TD-SCDMA 2010-2025 MHz | TD-SCDMA 1880-1920 MHz TD-SCDMA 2010-2025 MHz |
| LTE | LTE 850 MHz LTE 1800 MHz LTE 2100 MHz | LTE 1800 MHz LTE 2100 MHz LTE 2600 MHz LTE-TDD 1900 MHz (B39) LTE-TDD 2300 MHz (B40) LTE-TDD 2500 MHz (B41) LTE-TDD 2600 MHz (B38) | LTE-TDD 1900 MHz (B39) LTE-TDD 2300 MHz (B40) LTE-TDD 2500 MHz (B41) LTE-TDD 2600 MHz (B38) LTE 850 MHz LTE 1800 MHz LTE 2100 MHz LTE 2600 MHz |
Mobile network technologies and bandwidth
Communication between devices within mobile networks is realized via various generations of network technologies, which provide different bandwidth.
| Mobile network technologies | UMTS EDGE GPRS HSPA+ LTE Cat 4 | UMTS EDGE GPRS HSPA+ LTE Cat 4 EV-DO Rev. A TD-SCDMA TD-HSDPA | UMTS EDGE GPRS HSPA+ LTE Cat 6 EV-DO Rev. A TD-SCDMA TD-HSDPA |
Operating system
Operating system is the system software, which manages and controls the functioning of the hardware components of the device.
| Operating system (OS) | Android 6.0 Marshmallow | CyanogenMod 12.1 (Android 5.1.1 Lollipop) CyanogenMod 13 (Android 6.0 Marshmallow) Android 7.0 Nougat | MIUI V8.2 (Android 6.0.1 Marshmallow) MIUI V8.x (Android 7.0 Nougat) MIUI V9 MIUI V10 |
| User interface (UI) | - | ZUI | - |
System on Chip (SoC)
A system on a chip (SoC) includes into a single chip some of the main hardware components of the mobile device.
| SoC | MediaTek MT6753 | Qualcomm Snapdragon 801 MSM8974AC | Qualcomm Snapdragon 625 MSM8953 |
| Process technology | 28 nm | 28 nm | 14 nm |
| CPU | ARM Cortex-A53 | Krait 400 | ARM Cortex-A53 |
| CPU bits | 64 bit | 32 bit | 64 bit |
| Instruction set | ARMv8-A | ARMv7 | ARMv8 |
| Level 0 cache memory (L0) | - | 4 KB + 4 KB | - |
| Level 1 cache memory (L1) | 32 KB + 32 KB | 16 KB + 16 KB | - |
| Level 2 cache memory (L2) | 512 KB 0.5 MB | 2048 KB 2 MB | - |
| CPU cores | 8 | 4 | 8 |
| CPU frequency | 1300 MHz | 2500 MHz | 2000 MHz |
| GPU | ARM Mali-T720 MP3 | Qualcomm Adreno 330 | Qualcomm Adreno 506 |
| GPU cores | 3 | 4 | - |
| GPU frequency | 450 MHz | 578 MHz | 650 MHz |
| RAM capacity | 2 GB 3 GB | 3 GB | 3 GB 4 GB |
| RAM type | LPDDR3 | LPDDR3 | LPDDR3 |
| RAM channels | Single channel | Double channel | Single channel |
| RAM frequency | 800 MHz | 933 MHz | 933 MHz |
Storage
Every mobile device has a built-in storage (internal memory) with a fixed capacity.
| Storage | 16 GB 32 GB | 64 GB | 16 GB 32 GB 64 GB |
| - | eMMC 5.0 | eMMC 5.0 |
Memory cards
Memory cards are used in mobile devices for expanding their external storage capacity.
| Types | microSD microSDHC microSDXC | - | microSD microSDHC microSDXC |
Display
The display of a mobile device is characterized by its technology, resolution, pixel density, diagonal length, color depth, etc.
| Type/technology | IPS | IPS | IPS |
| Diagonal size | 5.5 in 139.7 mm 13.97 cm | 5.5 in 139.7 mm 13.97 cm | 5.5 in 139.7 mm 13.97 cm |
| Width | 2.7 in 68.49 mm 6.85 cm | 2.7 in 68.49 mm 6.85 cm | 2.7 in 68.49 mm 6.85 cm |
| Height | 4.79 in 121.76 mm 12.18 cm | 4.79 in 121.76 mm 12.18 cm | 4.79 in 121.76 mm 12.18 cm |
| Aspect ratio | 1.778:1 16:9 | 1.778:1 16:9 | 1.778:1 16:9 |
| Resolution | 1080 x 1920 pixels | 1080 x 1920 pixels | 1080 x 1920 pixels |
| Pixel density | 401 ppi 157 ppcm | 401 ppi 157 ppcm | 401 ppi 157 ppcm |
| Color depth | 24 bit 16777216 colors | 24 bit 16777216 colors | 24 bit 16777216 colors |
| Display area | 70.01 % | 69.51 % | 72.9 % |
| Other features | Capacitive Multi-touch Scratch resistant | Capacitive Multi-touch | Capacitive Multi-touch Scratch resistant |
| Corning Gorilla Glass 3 OGS (One Glass Solution) | GFF full lamination Anti-fingerprint coating 1500:1 contrast ratio 450 cd/m² 100% NTSC | Display manufacturer - Boe / Tianma 2.5D curved glass screen 1000:1 contrast ratio 450 cd/m² 72% NTSC |
Sensors
Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.
| Sensors | Proximity Light Accelerometer Fingerprint | Proximity Light Accelerometer Compass Gyroscope Fingerprint Hall | Proximity Light Accelerometer Compass Gyroscope Fingerprint Hall |
| - | Fingerprint sensor model - Fingerprint Cards FPC1155 | Fingerprint sensor model - Fingerprint Cards FPC1035 / Goodix |
Rear camera
The primary camera of the mobile device is usually placed on its back and can be combined with one or more additional cameras.
| Sensor model | Sony IMX214 Exmor RS | Sony IMX214 Exmor RS | Sony IMX258 Exmor RS |
| Sensor type | CMOS | CMOS | CMOS |
| Sensor size | 4.69 x 3.52 mm 0.23 in | 4.69 x 3.52 mm 0.23 in | 4.71 x 3.49 mm 0.23 in |
| Pixel size | 1.127 µm 0.001127 mm | 1.127 µm 0.001127 mm | 1.133 µm 0.001133 mm |
| Crop factor | 7.38 | 7.38 | 7.37 |
| ISO | - | - | 100 - 1600 |
| Aperture | f/2 | f/2.2 | f/2 |
| Focal length and 35 mm equivalent | - | 3.88 mm 28.63 mm *(35 mm / full frame) | 3.57 mm 26.33 mm *(35 mm / full frame) |
| Number of lenses | 6 | 5 | 5 |
| Flash type | Dual LED | Dual LED | Dual LED |
| Image resolution | 4160 x 3120 pixels 12.98 MP | 4160 x 3120 pixels 12.98 MP | 4160 x 3120 pixels 12.98 MP |
| Video resolution | 1920 x 1080 pixels 2.07 MP | 1920 x 1080 pixels 2.07 MP | 1920 x 1080 pixels 2.07 MP |
| Video FPS | 30 fps | 30 fps | 30 fps |
| Features | Autofocus Continuous shooting Digital zoom Geotagging Panorama HDR Touch focus Face detection White balance settings ISO settings Exposure compensation Self-timer Scene mode | Autofocus Continuous shooting Digital zoom Digital image stabilization Optical image stabilization Geotagging Panorama HDR Touch focus Face detection White balance settings ISO settings Exposure compensation Self-timer Scene mode Macro mode | Autofocus Continuous shooting Digital zoom Geotagging Panorama HDR Touch focus Face detection White balance settings ISO settings Exposure compensation Self-timer Scene mode Phase detection autofocus (PDAF) |
| - | - | Available also with Samsung S5K3L8 (ISOCELL) 720p @ 120 fps |
Front camera
Modern smartphones have one or more front cameras and their positioning has led to various design concepts – pop-up camera, rotating camera, notch, punch hole, under-display camera, etc.
| Sensor model | Sony IMX219PQ Exmor R | OmniVision OV8865 | Samsung S5K5E8 |
| Sensor type | CMOS BSI | CMOS BSI 2 | CMOS BSI |
| Sensor size | 3.67 x 2.76 mm 0.18 in | 4.61 x 3.47 mm 0.23 in | 2.9 x 2.15 mm 0.14 in |
| Pixel size | 1.124 µm 0.001124 mm | 1.414 µm 0.001414 mm | 1.119 µm 0.001119 mm |
| Crop factor | 9.42 | 7.49 | 11.99 |
| Aperture | f/2 | f/2.2 | f/2 |
| Focal length and 35 mm equivalent | - | 3.7 mm 27.72 mm *(35 mm / full frame) | 2.64 mm 31.63 mm *(35 mm / full frame) |
| Field of view | - | 73.6 ° | 85 ° |
| Image resolution | 3264 x 2448 pixels 7.99 MP | 3264 x 2448 pixels 7.99 MP | 2592 x 1944 pixels 5.04 MP |
| Video resolution | 1280 x 720 pixels 0.92 MP | 1920 x 1080 pixels 2.07 MP | 1280 x 720 pixels 0.92 MP |
| Video FPS | 30 fps | 30 fps | 30 fps |
Audio
Information about the type of speakers and the audio technologies supported by the device.
| Speaker | Loudspeaker Earpiece | Loudspeaker Earpiece | Loudspeaker Earpiece |
| - | 192 kHz / 24-bit | - |
Radio
The radio in a mobile device is a built-in FM radio receiver.
| Radio | Yes | No | Yes |
Tracking/Positioning
Information about the positioning and navigation technologies supported by the device.
| Tracking/Positioning | GPS A-GPS | GPS A-GPS GLONASS BeiDou | GPS A-GPS GLONASS BeiDou |
Wi-Fi
Wi-Fi is a technology that provides wireless data connections between various devices within a short range.
| Wi-Fi | 802.11b 802.11g 802.11n Wi-Fi Hotspot | 802.11a 802.11b 802.11g 802.11n 802.11n 5GHz 802.11ac Dual band Wi-Fi Hotspot | 802.11a 802.11b 802.11g 802.11n 802.11n 5GHz Dual band Wi-Fi Hotspot Wi-Fi Direct Wi-Fi Display |
Bluetooth
Bluetooth is a standard for secure wireless data transfer between different types of devices over short distances.
| Version | 4.0 | 4.1 | 4.2 |
| Features | A2DP | A2DP AVRCP EDR HFP HID LE MAP PAN PBAP SPP | A2DP HID LE |
USB
The Universal Serial Bus (USB) is an industry standard that allows different electronic devices to exchange data.
| Connector type | Micro USB | USB Type-C | Micro USB |
| Version | 2.0 | 2.0 | 2.0 |
| Features | Charging Mass storage | Charging Mass storage On-The-Go | Charging Host Mass storage On-The-Go |
Headphone jack
The headphone jack is an audio phone connector, a.k.a. an audio jack. The most widely used one in mobile devices is the 3.5 mm headphone jack.
| Headphone jack | Yes | Yes | Yes |
Connectivity
Information about other important connectivity technologies supported by the devices.
| Connectivity | Computer sync OTA sync Tethering | Computer sync OTA sync Tethering | Computer sync OTA sync Infrared Tethering VoLTE |
Browser
A web browser is a software application for accessing, fetching, displaying and navigating through information on the World Wide Web.
| Browser | HTML HTML5 CSS 3 | HTML HTML5 CSS 3 | HTML HTML5 CSS 3 |
Audio file formats/codecs
Mobile devices support various audio file formats and codecs, which respectively store and code/decode digital audio data.
| Audio file formats/codecs | AAC AMR eAAC+ FLAC MIDI MP3 OGG WMA WAV | AAC AMR AMR-WB eAAC+ FLAC M4A MIDI MP3 OGG WMA WAV | AAC AAC+ AMR AMR-WB eAAC+ FLAC MIDI MP3 OGG WMA WAV |
Video file formats/codecs
Mobile devices support various video file formats and codecs, which respectively store and code/decode digital video data.
| Video file formats/codecs | 3GPP AVI H.263 H.264 MP4 Xvid | 3GPP AVI Flash Video H.263 H.264 MKV QuickTime MP4 WebM WMV Xvid | 3GPP AVI H.263 H.264 H.265 MKV QuickTime VC-1 Xvid |
Battery
The batteries of mobile devices differ in capacity and technology. They provide the electrical charge needed for the functioning of the devices.
| Capacity | 3480 mAh | 4100 mAh | 4100 mAh |
| Type | Li-Ion | Li-Polymer | Li-Polymer |
| 2G talk time | - | 40 h 2400 min 1.7 days | 18 h 1080 min 0.8 days |
| 2G stand-by time | - | 600 h 36000 min 25 days | 264 h 15840 min 11 days |
| 3G talk time | - | 40 h 2400 min 1.7 days | 18 h 1080 min 0.8 days |
| 3G stand-by time | - | 600 h 36000 min 25 days | 264 h 15840 min 11 days |
| 4G talk time | - | 38 h 2280 min 1.6 days | - |
| 4G stand-by time | - | 526 h 31560 min 21.9 days | - |
| Charger output power | 5 V / 1.5 A | 5 V / 2 A | 5 V / 2 A |
| Quick charge technology | - | Qualcomm Quick Charge 1.0 | - |
| Features | Non-removable | Fast charging Non-removable | Non-removable |
| - | - | Battery model: BN43 |
Specific Absorption Rate (SAR)
The SAR rating shows the amount of electromagnetic radiation absorbed by the human body when using a mobile device, expressed in W/kg.
| Head SAR (EU) | - | - | 0.724 W/kg |
| Body SAR (EU) | - | - | 0.674 W/kg |
| Head SAR (USA) | - | - | 0.85 W/kg |
| Body SAR (USA) | - | - | 0.69 W/kg |
| Firefly Aurii Envy | ZUK Z1 | Xiaomi Redmi Note 4X |