In depth comparison and review of Xiaomi MI 4i and Vivo X51 5G. 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 | Xiaomi MI 4i | Vivo X51 5G |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | V2006 | |
| Form Factor | Touch | Touch | |
| Height | 138.1 mm | 158.46 mm | Vivo X51 5G has greater height than Xiaomi MI 4i. |
| Width | 69.6 mm | 72.8 mm | Vivo X51 5G has greater width than Xiaomi MI 4i. |
| Depth | 7.8 mm | 8.04 mm | Xiaomi MI 4i is narrower than Xiaomi MI 4i. |
| Weight | 130 g | 181.5 g | Xiaomi MI 4i is lighter than Xiaomi MI 4i. |
| Body Colour | Black | Dark grey | White | Alpha grey | |
| Waterproof (Water-resistant) | - | - | |
| IP rating | - | IP53 | |
| SAR Value | 1.29 W/kg | 1.205 W/kg (head), 1.239 W/kg (body), 3.086 W/kg (limb) | |
| Integrated Components | FM radio | - | |
| Connector Type | 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 | Dual-SIM | Dual-SIM |
| DISPLAY | Xiaomi MI 4i | Vivo X51 5G |
|---|
| Display Type | LCD display | OLED display | |
|---|---|---|---|
| Display Technology | IPS | AMOLED | |
| Screen Size (Display Size) | 5" | 6.56" | Vivo X51 5G has larger screen size than Xiaomi MI 4i. |
| Screen Resolution (Display Resolution) | 1920 x 1080 pixels | 2376 x 1080 pixels | Vivo X51 5G has better screen resolution than Xiaomi MI 4i. |
| Display Format | Full HD | - | |
| Pixel Density | 441 ppi | 398 ppi | Xiaomi MI 4i has better pixel density than Vivo X51 5G. |
| Aspect Ratio | - | 19.8:9 | |
| Max Brightness | - | 500 cd/m² | |
| Colour Depth | 16.7 million colours | 16.7 million colours | Both phones have the same color depth. |
| Display Protection (Screen Protector) | Corning Concore Glass | - |
| PROCESSOR | Xiaomi MI 4i | Vivo X51 5G |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 615 | Qualcomm Snapdragon 765G | |
|---|---|---|---|
| Clock Speed | 1.7 GHz | 2.4 GHz | Vivo X51 5G has higher clock speed than Xiaomi MI 4i. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | Yes | - | Xiaomi MI 4i has 64-bit architecture. |
| Graphics System (GPU) | Qualcomm ADRENO 405 | - |
| MEMORY | Xiaomi MI 4i | Vivo X51 5G |
|---|
| RAM | 2 GB | 8 GB | Vivo X51 5G has more RAM than Xiaomi MI 4i. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 16 GB | 256 GB | Vivo X51 5G has more internal memory than Xiaomi MI 4i. |
| CAMERA | Xiaomi MI 4i | Vivo X51 5G |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 1 | 4 | |
|---|---|---|---|
| Sensor Resolution | 13 Megapixel | 48 Megapixel | Vivo X51 5G has better camera resolution than Xiaomi MI 4i. |
| Lens Aperture | F/2.0 | F/1.6 | Vivo X51 5G has better lens aperture than Xiaomi MI 4i. |
| Lens Construction | 5-element | - | |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | - | Yes | |
| Special Effects | - | HDR | |
| HDR Mode | Auto HDR mode | - | |
| Camera Modes | Panorama, manual mode | Panorama, Time-lapse mode, Pro mode, Live Photos, AI makeup, Portrait, Super Night mode, astro mode, pro sports mode, DOC mode | |
| Face Recognition (Face ID) | Face detection, smile detection | - | Xiaomi MI 4i has face detection. |
| Light Source | Dual LED flash | LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) | - | |
| Camera Features (Functions) | - | 60x Hyper Zoom, Gimbal Super Night Master, Gimbal Super Sport Expert |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | - | 13 Megapixel | |
|---|---|---|---|
| Lens Aperture (2nd Camera) | - | F/2.46 |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 8 Megapixel | |
|---|---|---|---|
| Lens Type (3rd Camera) | - | Wide-angle lens | |
| Lens Aperture (3rd Camera) | - | F/2.2 |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | - | 8 Megapixel | |
|---|---|---|---|
| Lens Type (4th Camera) | - | Telephoto lens | |
| Lens Aperture (4th Camera) | - | F/3.4 |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 5 Megapixel | 32 Megapixel | Vivo X51 5G has better front camera resolution than Xiaomi MI 4i. |
| Lens Type (Front) | Wide-angle lens | - | |
| Lens Aperture (Front) | F/1.8 | F/2.45 | Xiaomi MI 4i has better front lens aperture than Xiaomi MI 4i. |
| Lens Element Qty (Front) | 5-element | - | |
| Special Effects (Front) | - | HDR | |
| Camera Modes (Front) | - | Live Photos, Portrait | |
| Camera Features (Front) | - | 2 x digital zoom |
| BATTERY AND CHARGING | Xiaomi MI 4i | Vivo X51 5G |
|---|
| Battery Capacity (Battery Size) | 3120 mAh | 4315 mAh | Vivo X51 5G has larger battery capacity than Xiaomi MI 4i. |
|---|---|---|---|
| Talk Time | 2100 minutes | - | |
| Run Time Details | Talk (WCDMA): up to 2100 min | - | |
| Battery Technology | Lithium Ion | - |
| CELLULAR | Xiaomi MI 4i | Vivo X51 5G |
|---|
| Technology | TD-SCDMA / WCDMA (UMTS) / GSM | CDMA2000 1X / GSM / WCDMA (UMTS) | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 5G | Vivo X51 5G has more advanced generation mobile network. |
| Operating System | Android 5.0.2 (Lollipop) | Funtouch OS 10 (based on Android 10) | |
| User Interface | MIUI V6 | - | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, GLONASS, BeiDou, Galileo |
| COMMUNICATIONS | Xiaomi MI 4i | Vivo X51 5G |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE | FDD-LTE, TDD-LTE, 5G NR FR1 | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM, 800 CDMA2000 1X | |
| 3G UMTS Band | - | Band 1, Band 2, Band 4, Band 5, Band 8 | |
| 3G UMTS Frequency | - | 2100, 1900, 1700, 850, 900 | |
| 4G LTE Band | Band 3, Band 7, Band 38, Band 39, Band 40, Band 41 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 17, Band 18, Band 19, Band 20, Band 26, Band 28, Band 32, Band 38, Band 39, Band 40, Band 41, Band 66 | |
| 4G LTE Frequency | FDD 1800+, FDD 2600, TDD 2600, TDD 1900, TDD 2300, TDD 2500 | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 850+, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 1900, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 | |
| 5G NR Band | - | N1, n3, n7, n8, n28, n38, n41, n77, n78 | |
| 5G NR Frequency | - | FDD 2100, FDD 1800, FDD 2600, FDD 900, FDD 700APT, TDD TD 2600, TDD TD 2500, TDD TD 3700, TDD TD 3500 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | Wi-Fi | |
| Bluetooth | Bluetooth 4.1 | Bluetooth 5.1 | |
| Bluetooth Profiles | A2DP, HID | - | |
| NFC | - | Yes | Vivo X51 5G has NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | - |
| MEDIA | Xiaomi MI 4i | Vivo X51 5G |
|---|
| Supported Digital Audio Standards | WAV, MP3, FLAC, eAAC+ | WAV, MPEG 2 Audio, MP3, FLAC, MIDI, APE (Monkey's Audio), AMR-WB, AMR-NB, Vorbis | |
|---|---|---|---|
| Supported Digital Video Standards | XviD, MPEG-4, DivX, H.264 | MKV, AVI, 3GP, TS, MP4 | |
| Audio Amplifier | - | AK4377A |
| FEATURES | Xiaomi MI 4i | Vivo X51 5G |
|---|
| Phone Functions | Speakerphone, call timer, conference call, flight mode, vibrating alert | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
|---|---|---|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor, hall sensor | Accelerometer, ambient light sensor, proximity sensor, digital compass | |
| Security Devices | - | Fingerprint reader | |
| Additional Phone Features | MIMO technology, Active noise-cancellation | - |
| OTHERS | Xiaomi MI 4i | Vivo X51 5G |
|---|
| Included Accessories | Power adapter | Headset, USB cable, power adapter, SIM card removal tool, USB-C to 3.5 jack adapter, protective case, protective film | |
|---|---|---|---|
| Compliant Standards | - | IP53 |
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