Xiaomi Redmi Note 4 16GB Review
30 Септември 2016, 09:05:49

Specifications
Xiaomi Redmi Note 4 is equipped with a 5.5-inch IPS display with a resolution of 1080 x 1920 pixels and a pixel density of 401 ppi. Its static contrast ratio and peak brightness level are typical for a good LCD display and measure 1000:1 and 450 cd/sq.m. Furthermore, NTSC coverage is 72%, which means it is very close to the full sRGB coverage and promises lack of over-saturation and color deviation. 2.5D curved glass as a top display year has become the norm and this model is no exception. Hardware-wise, the smartphone is based on the 20nm MediaTek Helio X20 MT6797 chipset, which features the so called three-cluster architecture, created to optimize both performance and power efficiency. The first cluster consists of two Cortex-A72 CPU cores clocked at 2.1GHz, the second - of four Cortex-A53 CPU cores clocked at 2GHz and the third features another quadruplet of Cortex-A53 cores clocked at 1.4GHz. A 700 MHz quad-core Mali-T880 MP4 GPU is responsible for the graphics. There are two variants of the model in terms of RAM and storage. The first is equipped with 2GB of RAM and 16GB of internal memory. The second has 3GB of RAM and 64GB of internal memory. In both cases, storage can be expanded with up to 128GB. The options for connectivity include dual-band Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi Hotspot, Wi-Fi Direct, Wi-Fi Display, Bluetooth 4.2, USB Type-C 2.0, USB OTG and as long as it concerns satellite navigation, the device works with the three main systems - GPS, Glonass, BeiDou. Regarding network bands, these include 2G GSM (850, 900, 1800, 1900 MHz), 2.5G CDMA 800 MHz, 3G W-CDMA (850, 900, 1900, 2100 MHz), 3G TD-SCDMA (1880-1920, 2010-2025 MHz), 4G FDD-LTE (900, 1800, 2100, 2600 MHz), 4G TDD-LTE (1900, 2300, 2500, 2600 MHz). Both SIM cards support 4G LTE Cat. 6 with VoLTE. There's a fingerprint sensor on the rear below the main camera along with a proximity, light, accelerometer, compass, gyroscope, and Hall sensor. The primary camera is equipped with a 13-megapixel Samsung S5K3L8 ISOCELL sensor with optical format 1/3.06", a 5-element lens with an f/2.0 aperture, PDAF and a dual-tone LED flash. The front-facing camera features a 5-megapixel Samsung S5K5E8YXB6 sensor with an optical format 1/5" and an f/2.0 lens. Power is supplied by a 4100 mAh Lithium-Polymer battery with an ultra high-density (713 Wh/L). It is non removable and arrives with a 5V/2A fast charger. For complete details, here is the full list of Xiaomi Redmi Note 4 16GB specifications.What's in the box



Design, build and controls
Xiaomi Redmi Note 4's body is made of a high-quality aluminum ingot that has undergone more than 30 processes in order to achieve a more unified metal structure. Its back has a matte finish that is not slippery. Along the vertical edges the back is slightly curved in order to provide comfortable grip on one hand, and on the other - to visually decrease the thickness of the device. The latter is also due to the fact that both, rear and front edges are chamfered and glossy, making the matte frame between them look really thin. In addition, the front plastic housing of the display protrudes above the frame and is filled in with the 2.5D curved glass. Yes, filled in is the right verb here, because the glass does not reach the frame, but this white plastic housing, which serves as a frame for the display. It is the same with the Redmi Pro, which however has a brushed metal effect on its back. At a first glance, both models seem to be visually identical, however, there are some minor differences, besides the back design effect. For starters, Redmi Note 4 is heavier with 1 gram, narrower with 0.2 mm, shorter with 0.5 mm and thicker with 0.2 mm. However, according to its dimensions and weight the model is quite average for a 5.5-inch smartphone with a 4100 mAh battery. More specifically, the device weighs 175 grams and is 76 mm wide, while its thickness measures 8.35 mm. The only relatively more compact dimension of the Redmi Note 4 is its height - 151 mm. It arrives in three colors. The one we are reviewing - silver with a white front, as well as gold with a white front and grey with a black front.





Display
Xiaomi Redmi Note 4 features a 5.5-inch IPS display with an FHD resolution (1080 x 1920). Borders and bezels are thick, but this is expected, so no surprises here. The display unit has a 2.5D curved top glass layer, but as usual for budget smartphones, there's no mention of a special protective glass. Neither the Mi Max, nor the Redmi Pro have such. According to the specifications, the display panel has a 1000:1 contrast ratio and a peak brightness of 450 cd/m², while covering 72% of the NTSC color space. Our subjective view about our unit is that it has one of the best LCD displays on smartphones we have reviewed. The measurements below do prove that the display unit on Redmi Note 4 is a quality one and this is a big plus having in mind the really low price of the model.
Brightness | White luminance | Black luminance | Contrast | Color temperature |
---|---|---|---|---|
100 % | 381.816 cd/m2 | 0.293 cd/m2 | 1303 | 7342 K |
75 % | 264.235 cd/m2 | 0.209 cd/m2 | 1302 | 7270 K |
50 % | 154.025 cd/m2 | 0.119 cd/m2 | 1294 | 7341 K |
25 % | 64.045 cd/m2 | 0.049 cd/m2 | 1307 | 7205 K |
0 % | 5.425 cd/m2 | 0.005 cd/m2 | 1085 | 7316 K |







OS, UI and software
Xiaomi Redmi Note 4 arrived with an original MIUI 8, which immediately received an update to v8.0.9.0.MBFCNDG, which provides some minor optimizations and fixes. This is the Chinese version of MIUI as there isn't an official international one yet. As usual, it is deeply customized and its 8th version goes much closer to creating a unified Xiaomi media eco-system, than the MIUI 7. The lock screen is quite "clean" with an option to swipe up in order to unlock and a shortcut to the camera app. The Wallpaper Carousel is gone and from the Settings you can choose shortcuts to which apps should appear on the lock screen. The home screen contains a row of docked apps: Dialer, Messenger, Browser and Camera. Pre-installed and additionally installed apps appear on successive screens. To access the list of active apps, you have to tap the menu button. You can remove them from the list by swiping them up one by one, or use the Clean All function. A swipe down gives you access to a shortcut for locking the app and preventing it from being cleaned from the list and another shortcut is to more info about this app. A new feature of MIUI 8 is the way you preview apps in this list. They can either be shown as smaller screens (such as it is up to now), or as icons. The Volume shade is also different, compared to MIUI 7 and is no longer circular, but a rectangular one with all three volume types together.



















































































Networks, calls and connectivity
Xiaomi Redmi Note 4 has a dual-SIM card tray with hybrid functions. It can house either a micro-SIM and a nano-SIM card, or a micro-SIM and a microSD card in case you need more storage. The two slots work with 4G LTE Cat. 6 networks in a dual-standby mode. The model supports a wide range of network bands, including 2G GSM (850, 900, 1800, 1900 MHz), 2.5G CDMA 800 MHz, 3G TD-SCDMA (1880-1920 and 2010-2025 MHz) and WCDMA (850, 900, 1700, 1900, 2100 MHz), 4G FDD-LTE (900, 1800, 1900, 2100, 2600 MHz) and 4G TDD-LTE (1900, 2300, 2500, 2600 MHz) networks as well as VoLTE. There have been no issues with call quality and reception whatsoever. Unlike Redmi Pro, in Redmi Note 4 you get more advanced Wi-Fi connectivity - dual-band, 802.11 a/b/g/n/ac. The rest of the wireless connectivity options include Wi-Fi Direct, Wi-Fi Hotspot, Wi-Fi Display, Bluetooth 4.2 and an infrared port. Wi-Fi and Bluetooth connections are established quickly and easily. However, there is no pre-installed app for the infrared port. You have to download one of your choice in order to use it. Otherwise, the IR blaster is fully functional. The micro-USB 2.0 port works fine, no OTG support. The model works with GPS, Glonass and Beidou and our review unit has managed to detect a good number of satellites from all three with very good accuracy.











Performance
Xiaomi Redmi Note 4 is the fifth device based on a deca-core MediaTek Helio X20 MT6797 chipset that we review. The most noteworthy feature of this system-on-chip is its three-cluster architecture, created with two goals in mind - intelligently switch between the three clusters depending on the load, so it optimizes both performance and power efficiency. The chipset includes two 2.1GHz Cortex-A72 cores, four 2GHz Cortex-A53 cores and another four of these, but clocked at 1.4GHz. There's a 700MHz quad-core Mali-T880 MP4 GPU as well, responsible for the graphics. Our review unit scored 84631 in AnTuTu, which is a bit less than the 87390 result of the Redmi Pro. During our review of the latter, we have already detected some issues with the GPU and not-so-optimized performance of the CPU. These confirm with the Redmi Note 4, which has results that are very close, but lower than those of the Redmi Pro, making it the slowest among the five Helio X20-based smartphones we have tested. Vernee Apollo Lite has scored 93030 in AnTuTu, Zopo Speed 8 has a result of 92644 points, and LeEco Le 2 (X620) has made 92374 during our test. It is the same with the results from all other benchmark tests we have performed.























Cameras
Xiaomi has tweaked the camera app in MIUI 8 by changing the appearance of some icons and relocating functions. The shortcuts to the HDR and flash shortcuts are moved to the top of the display, releasing space for the shortcuts to the switch between the cameras and the modes menu, which appear just above the main buttons. When you choose a specific mode, its settings appear above the big, circular shutter button. There are several modes to choose from, including panorama, beautify, HHT, scene choice, timer, audio, straighten, and manual mode. The latter applies for changes in the white balance and ISO. The list of modes has an icon to the camera settings. Both are different depending on which camera is on and which function it uses - taking photos or shooting videos. You can also edit a photo by applying filters to it, adding stickers, adjust the position or doodle it as well as enhance it by tweaking contrast, saturation, sharpness, etc.















Primary camera
The primary camera of Xiaomi Redmi Note 4 employs a 13-megapixel S5K3L8 sensor with a 1/3.06" format. It is coupled with a 5-element lens with an f/2.0 aperture, dual-tone LED flash and phase-detection autofocus. The camera outputs photos with a resolution of 4160 x 3120 pixels and is capable of shooting 1080p videos at 30 fps and 720p videos at 120 fps. The same camera sensor is provided in the Xiaomi Redmi 3 and the Redmi 3 Pro.





Secondary camera
The secondary camera's sensor of the Redmi Note 4 is the same as the one of the Redmi Pro - a 5-megapixel Samsung S5K5E8 CMOS BSI one. The selfie snapper also features an 85-degree wide-angle lens with an f/2.0 aperture and outputs images with a resolution of 2592 x 1944 pixels. It is also capable of making 720p videos at 30 fps. Other devices that we have reviewed and have the same sensor for their front camera are the Vernee Apollo Lite and Meizu m3 Note.


Audio
You're most probably familiar with the Music app from older MIUI versions. It is not changed at all in appearance and main functions. You can listen to music from your device, or choose to listen online, even download free and paid content, or even stream music. To use the online services, you must have an active MI account. The equalizer, grouping and ordering of audio files is the same and you can adapt them easily to your personal preferences. Of course you can also change the Headphones & audio effects settings directly from the Music app.







Test | Value | RMAA rating |
---|---|---|
Frequency response (from 40 Hz to 15 kHz), dB | -0.03, -0.16 | Excellent |
Noise level, dB (A) | -96.9 | Excellent |
Dynamic range, dB (A) | 91.6 | Very good |
THD, % | 0.0036 | Very good |
THD + Noise, dB (A) | -83.5 | Good |
IMD + Noise, % | 0.0078 | Excellent |
Stereo crosstalk, dB | -83.5 | Very good |
IMD at 10 kHz, % | 0.014 | Very good |
General performance | Very good |






Battery
The Power Efficiency app is a part of Xiaomi's Security app, which has been updated in MIUI 8. It no longer contains pre-set battery profiles, but has a Battery saver instead, which is switched off by default and you can choose. The Battery use tab provides more tools for power management and includes the battery monitor with information about, which hardware and apps consume the most power. The Settings icon of the Power app includes the Schedule power on & off, Battery indicator type, Battery drain and Heating notifications features as well as turn off mobile data and clear cache when the device is locked functions. You can also manage separate apps to optimize battery life. The app can also analyze battery usage and suggest optimizations. The main Settings menu includes a Battery & performance section, which actually has shortcuts to the Power Efficiency app and include several additional features such as choosing between a Balanced and a Performance battery profile or choose whether the device should show or hide the System animations.











Final thoughts
If there has to be a final verdict in terms of comparing the Redmi Note 4 and the Redmi Pro, we think that the final cut will depend on the price. Both models have nearly identical design and solid build, run the latest MIUI 8, feature one and the same system-on-chip and almost identical batteries with identical performance. We like the Redmi Note 4 display best, though it is not OLED, and this model also has a very good audio. On the other hand, if you like OLED displays and prefer to have two rear cameras to tinker with, then the Pro is your choice. So, whether you should go for one model or the other, really depends on how much money you're ready to part with.Последни ревюта
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Дисплей: 5.93 in, IPS, 1080 x 2160 пиксела, 24 бита
Батерия: 4000 mAh, Li-Polymer
Операционна система: Android 8.1 Oreo
Камера: 4608 x 3456 пиксела, 1920 x 1080 пиксела, 30 к/сек.

Alldocube X Wi-Fi Тablet Review
Размери: 243.68 x 173.14 x 6.9 мм
Тегло: 496 г
SoC: MediaTek MT8176
Процесор: 2x 2.1 GHz ARM Cortex-A72, 4x 1.7 GHz ARM Cortex-A53, Брой ядра: 6
Графичен ускорител: PowerVR GX6250, 650 MHz
Оперативна памет: 4 ГБ, 933 MHz
Вградена памет: 64 ГБ
Дисплей: 10.5 in, Super AMOLED, 2560 x 1600 пиксела, 24 бита
Батерия: 8000 mAh, Li-Ion
Операционна система: Android 8.1 Oreo
Камера: 3264 x 2448 пиксела, 1920 x 1080 пиксела, 30 к/сек.

UMIDIGI F1 Review
Размери: 74.3 x 156.9 x 8.8 мм
Тегло: 186 г
SoC: MediaTek Helio P60 (MT6771V)
Процесор: 4x 2.0 GHz ARM Cortex-A73, 4x 2.0 GHz ARM Cortex-A53, Брой ядра: 8
Графичен ускорител: ARM Mali-G72 MP3, 800 MHz
Оперативна памет: 4 ГБ, 1800 MHz
Вградена памет: 128 ГБ
Дисплей: 6.3 in, IPS, 1080 x 2340 пиксела, 24 бита
Батерия: 5150 mAh, Li-Polymer
Операционна система: Android 9.0 Pie
Камера: 4608 x 3456 пиксела, 1920 x 1080 пиксела, 30 к/сек.

Xiaomi Redmi Note 7 Review
Размери: 75.21 x 159.21 x 8.1 мм
Тегло: 186 г
SoC: Qualcomm Snapdragon 660 MSM8976 Plus
Процесор: 4x 2.2 GHz Kryo 260, 4x 1.84 GHz Kryo 260, Брой ядра: 8
Графичен ускорител: Qualcomm Adreno 512
Оперативна памет: 3 ГБ, 4 ГБ, 6 ГБ, 1866 MHz
Вградена памет: 32 ГБ, 64 ГБ, 128 ГБ
Дисплей: 6.3 in, IPS, 1080 x 2340 пиксела, 24 бита
Батерия: 4000 mAh, Li-Polymer
Операционна система: MIUI V10.2 (Android 9.0 Pie)
Камера: 8000 x 6000 пиксела, 1920 x 1080 пиксела, 60 к/сек.

Ulefone Armor 6 Review
Размери: 83 x 166 x 13.3 мм
Тегло: 265 г
SoC: MediaTek Helio P60 (MT6771)
Процесор: 4x 2.0 GHz ARM Cortex-A73, 4x 2.0 GHz ARM Cortex-A53, Брой ядра: 8
Графичен ускорител: ARM Mali-G72 MP3, 800 MHz
Оперативна памет: 6 ГБ, 1800 MHz
Вградена памет: 128 ГБ
Дисплей: 6.2 in, IPS, 1080 x 2246 пиксела, 24 бита
Батерия: 5000 mAh, Li-Polymer
Операционна система: Android 8.1 Oreo
Камера: 4608 x 3456 пиксела, 1920 x 1080 пиксела, 30 к/сек.

Alldocube M8 Review
Размери: 215 x 122.9 x 8.48 мм
Тегло: 345 г
SoC: MediaTek Helio X27 (MT6797X)
Процесор: 2x 2.6 GHz ARM Cortex-A72, 4x 2.0 GHz ARM Cortex-A53, 4x 1.6 GHz ARM Cortex-A53
Графичен ускорител: ARM Mali-T880 MP4, 875 MHz
Оперативна памет: 3 ГБ, 800 MHz
Вградена памет: 32 ГБ
Дисплей: 8 in, IPS, 1920 x 1200 пиксела, 24 бита
Батерия: 5500 mAh, Li-Polymer
Операционна система: Android 8.0 Oreo
Камера: 2592 x 1944 пиксела, 1920 x 1080 пиксела, 15 к/сек.

UMIDIGI One Max Review
Размери: 75.6 x 156.8 x 8.35 мм
Тегло: 205 г
SoC: MediaTek Helio P23 (MT6763V)
Процесор: 4x 2.0 GHz ARM Cortex-A53, 4x 1.5 GHz ARM Cortex-A53, Брой ядра: 8
Графичен ускорител: ARM Mali-G71 MP2, 700 MHz
Оперативна памет: 4 ГБ, 1600 MHz
Вградена памет: 128 ГБ
Дисплей: 6.3 in, IPS, 720 x 1520 пиксела, 24 бита
Батерия: 4150 mAh, Li-Polymer
Операционна система: Android 8.1 Oreo
Камера: 3968 x 2976 пиксела, 1920 x 1080 пиксела, 15 к/сек.

Doogee Y7 Plus Review
Размери: 76.1 x 160.4 x 9.4 мм
Тегло: 191 г
SoC: MediaTek Helio P25 (MT6757CD)
Процесор: 4x 2.5 GHz ARM Cortex-A53, 4x 1.6 GHz ARM Cortex-A53, Брой ядра: 8
Графичен ускорител: ARM Mali-T880 MP2, 900 MHz
Оперативна памет: 6 ГБ, 1600 MHz
Вградена памет: 64 ГБ
Дисплей: 6.18 in, IPS, 1080 x 2246 пиксела, 24 бита
Батерия: 5080 mAh, Li-Polymer
Операционна система: Android 8.0 Oreo
Камера: 4608 x 3456 пиксела, 1920 x 1080 пиксела, 30 к/сек.

Nokia X7 Review
Размери: 75.76 x 154.8 x 7.97 мм
Тегло: 178 г
SoC: Qualcomm Snapdragon 710
Процесор: 2x 2.2 GHz Kryo 360, 6x 1.7 GHz Kryo 360, Брой ядра: 8
Графичен ускорител: Qualcomm Adreno 616, 500 MHz
Оперативна памет: 4 ГБ, 6 ГБ, 1866 MHz
Вградена памет: 64 ГБ, 128 ГБ
Дисплей: 6.18 in, IPS, 1080 x 2246 пиксела, 24 бита
Батерия: 3500 mAh, Li-Polymer
Операционна система: Android 8.1 Oreo
Камера: 4032 x 3024 пиксела, 3840 x 2160 пиксела, 30 к/сек.

Oukitel U23 Review
Размери: 75.8 x 153.75 x 9.3 мм
Тегло: 202 г
SoC: MediaTek Helio P23 (MT6763V)
Процесор: 4x 2.0 GHz ARM Cortex-A53, 4x 1.5 GHz ARM Cortex-A53, Брой ядра: 8
Графичен ускорител: ARM Mali-G71 MP2, 700 MHz
Оперативна памет: 6 ГБ, 1600 MHz
Вградена памет: 64 ГБ
Дисплей: 6.18 in, IPS, 1080 x 2246 пиксела, 24 бита
Батерия: 3500 mAh, Li-Polymer
Операционна система: Android 8.1 Oreo
Камера: 4576 x 3432 пиксела, 1920 x 1080 пиксела, 30 к/сек.