Redmi Note 4

In January 2017, the Snapdragon version of the Xiaomi Redmi Note 4 or Xiaomi Redmi Note 4X became the company's first major launch. It came with 2 GB RAM + 32 GB eMMC, 3 GB RAM + 16 or 32 GB eMMC and 4 GB RAM + 64 GB eMMC variants. The phone sports a 5.5-inch Full HD IPS display (1080 × 1920 resolution), translating to a pixel density of 401 ppi.{{cite web|url=http://www.androidauthority.com/xiaomi-redmi-note-4-review-749774/|title=Xiaomi Redmi Note 4 review|date=2017-02-17}} The display also promises to have contrast ratio of 1000:1 and 72% coverage of NTSC colour gamut.{{Cite web|url=https://www.mi.com/in/note4/|title=Xiaomi Redmi Note 4 Price and Features - Mi India|website=www.mi.com|access-date=2019-02-07}}

On February 14, 2017, alongside the Chinese release of the Redmi Note 4X, Xiaomi released a limited edition set of the phone featuring Hatsune Miku. The set contained a customized box, the phone, a power bank and a protective case.

In October 2017, Lei Jun announced that the sales of Redmi Note 4X exceeded 20 million units globally.{{Cite web|url=https://share.iclient.ifeng.com/shareNews?fromType=vampire&aid=sub_32413967|title="价格屠夫"名不虚传！红米NOTE4X：单机销量突破2000万|website=share.iclient.ifeng.com|access-date=2017-12-01}}

The company announced that as many as 9,624,110 units of Redmi Note 4 were sold in India in 2017 and that it was one of their best-selling smartphones in the last quarter of 2017.{{cite web|url=http://www.timesnownews.com/technology-science/article/xiaomi-sold-96-lakh-redmi-note-4-units-in-india-q4-2017/198584|title=Xiaomi sold more than 9.6 million Redmi note 4 last year|date=14 February 2018 |publisher=Times Now, edited by Suraj Sarkar 1805|access-date=2018-02-14}}

The device sold over 10 Million units in India alone.{{Cite web|url=https://twitter.com/manukumarjain/status/1065103055765430273|title=#RedmiNote4: 10M phones sold in one year! |last=Jain|first=Manu Kumar|date=2018-11-20|website=@manukumarjain|language=en|access-date=2019-02-07}}

The company discontinued the smartphone's sale in favor of the successors Redmi 5 and Redmi Note 5.

Xiaomi Redmi Note 4 MTK (codename nikel) is equipped with MediaTek MT6796 Helio X20 CPU and Mali-T880 MP4 GPU. It runs MIUI 8, (updated to MIUI 9.6) based on Android 6.0.

The Global 4 or 4X variant (SD - codename mido) uses Qualcomm's Octa-core 2.0 GHz Snapdragon 625 CPU and Adreno 506 GPU.

All variants included an {{convert|5.5|in|mm|abbr=on}} 1080p display, 2, 3 or 4 GB of RAM, 16, 32 or 64 GB eMMC 5.1 Flash storage, a 5MP front camera, non-removable 4100 mAh Li-Po battery (BN41/BN43) and it supports Wi-Fi 802.11a/b/g/n/ac* (* = Wi-Fi 802.11 ac band is supported on MTK variant only) networks on both the 2.4 and 5 GHz bands. Phones also support hybrid SIM and Memory Card configuration in which the user can have either two SIM cards or a SIM card + microSDHC card at one time because one SIM card and the microSDHC card share the same physical tray slot.

Another notable feature of the phone is the presence of a fingerprint sensor at the back which can also be used for capturing images via the front or the rear cameras. The device also comes equipped with an RGB Notification LED light and is recognized as one of the last phones by Xiaomi to have an RGB light instead of the monochromatic White color notification LED used in devices launched thereafter.

The Redmi Note 4 (MTK) has screws on each side of the micro-USB port which allows easy access to internal components. The Redmi Note 4X does not have this pair of screws.

Also, the Redmi Note 4 (MTK) has a full metal body whereas the Global and Snapdragon variants of the phone have an anodized aluminum body with plastic inserts at the top and bottom for better signal reception. The global variant also does not have the diamond cut finish found on the MediaTek variant of the phone.

On launch, it ran MIUI 8 based on Android 6.0, which was updated to MIUI 10.2 based on Android 7.0 for Snapdragon devices. Purchasing a Redmi Note 4 Snapdragon variant now will be running MIUI 8 based on Android 6.0.1 instead of Android 6.0. The Global Snapdragon Edition of the device is slated to receive MIUI 11 update based on Android 9.0 in November 2019.

The MediaTek edition, however, runs on MIUI 10 based on Android 6.0.

The Sailfish OS was ported on a Qualcomm version of Note 4.{{Cite web|title=Adaptations/libhybris/Install SailfishOS for mido - Mer Wiki|url=https://wiki.merproject.org/wiki/Adaptations/libhybris/Install_SailfishOS_for_mido|access-date=2021-11-17|website=wiki.merproject.org}}

Through Custom Roms, Android versions up to Android 15{{Cite web |title=Xiaomi Redmi Note 4 |url=https://forum.xda-developers.com/c/xiaomi-redmi-note-4.5781/ |access-date=2023-03-23 |website=XDA Forums |date=15 March 2023 |language=en-US}} is available for Note 4. It is one of the most widely supported phone in custom Rom community.

The smartphone received mostly positive feedback upon its launch because of its great battery life, CPU performance, good thermal performance, great price-to-performance ratio and a great day-to-day performance.

GSMArena states: "The Redmi Note 4(X)'s Snapdragon 625, which we consider to be the ultimate mid-range chipset for this generation, provides excellent performance with great power efficiency and thermal properties. The battery life of this phone is jaw-dropping, the MIUI experience is smooth, and the camera does well in all occasions. All these goodies come in a sturdy metal body, which adds to the already great value of the Redmi Note 4(X)." Also, in GSMArena's device review, the Snapdragon edition of the phone scored much better than the specified figures, getting a 1500:1 Contrast ratio, 484nits of maximum luminance and excellent colour accuracy for the class.[https://www.gsmarena.com/xiaomi_redmi_note_4_snapdragon-review-1593p3.php] {{Cite news|url=http://www.gsmarena.com/xiaomi_redmi_note_4_snapdragon-review-1593p9.php|title=Xiaomi Redmi Note 4 (S625) review: Take Note!|work=GSMArena.com|access-date=2017-09-12|language=en}}

According to AndroidAuthority: "The Redmi Note 4(X) is not perfect, but it is a well-rounded package that one wouldn't hesitate to recommend to anyone looking for a budget or mid-range smartphone. Packed in a neat chassis, the smartphone performs great and is a compelling value-for-money smartphone."[http://www.androidauthority.com/xiaomi-redmi-note-4-review-749774/ Xiaomi Redmi Note 4 review], by Abhishek Baxi, February 17, 2017, androidauthority.com

Gadgets360 also rated the phone 8 on 10, appreciating the device for its battery efficiency, good performance for the class and good thermal efficiency.{{Cite web|url=https://gadgets.ndtv.com/mobiles/reviews/xiaomi-redmi-note-4-review-1650455|title=Xiaomi Redmi Note 4 Review|last=Pratap|first=Ketan|website=NDTV Gadgets 360|date=19 January 2017 |language=en|access-date=2019-02-07}}

AndroidCentral also considered Redmi Note 4 (SD variant) to be one of the best smartphones one can buy in the mid-budget range even after 6 months of launch.{{Cite web|url=https://www.androidcentral.com/xiaomi-redmi-note-4-review-six-months-later|title=Xiaomi Redmi Note 4 review: Six months later|date=2017-07-25|website=Android Central|language=en|access-date=2019-02-07}}

TechRadar called Redmi Note 4 to be an overall impressive device overall, though lacking the X factor, getting 4/5 ratings.{{Cite web|url=https://www.techradar.com/reviews/xiaomi-redmi-note-4-review|title=Redmi Note 4 Review|date=23 January 2017 }}

Initially, upon launch, it was not received as the true successor of the Redmi Note 3 (Snapdragon variant) mostly because of the use of the Snapdragon 625 as opposed to the Snapdragon 650 in Redmi Note 3 in terms of the RAW performance of the CPU and GPU. Though perceived initially as a theoretical downgrade by media, XDA Developers also considered the device an upgrade to Redmi Note 3, citing its overall sustained performance, on par day to day performance and better battery and thermal performance by a good margin.{{Cite web|url=https://www.xda-developers.com/xiaomi-redmi-note-4-xda-review-in-depth/|title=Xiaomi Redmi Note 4 XDA Review: All Geared Up for Another Year of Success|date=2017-03-18|website=xda-developers|language=en-US|access-date=2019-02-07}}{{Cite web|url=https://www.xda-developers.com/redmi-note-4-xda-review/|title=Xiaomi Redmi Note 4 XDA Performance and Battery Life Review (Compared to Redmi Note 3)|date=2017-02-19|website=xda-developers|language=en-US|access-date=2019-02-07}} The new Snapdragon 625 was well received by users as well as reviewers after using the device for a while owing to the better fabrication process, battery life and thermal efficiency of the new chipset over the Snapdragon 650.

File:Xiaomi Redmi Note 4 Back.jpg|Back of gold Redmi Note 4X

File:Note 4.jpg|Back of black Redmi Note 4X

File:Redmi Note 4 inside 20170915.jpg|Inside of Redmi Note 4

File:Insides of Redmi Note 4X.jpg|Insides of Redmi Note 4 (X) MTK Version (left) and Qcom Version (right)

File:Xiaomi_Redmi_Note_3_fingerprint_scanner.jpg

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Category:Phablets

Note 4

Category:Mobile phones introduced in 2017

Category:Discontinued smartphones

Category:Mobile phones with infrared transmitter