science

Redmi

Redmi is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Redmi rather than just read about it. In short: Redmi (stylized in all caps) is a subsidiary brand owned by Chinese electronics company Xiaomi. It was first launched in July 2013 as a budget smartphone line, and became a separate sub-brand of Xiaomi in 2019 to takeover entry-level and mid-range devices originally produced by Xiaomi brand, while Xiaomi itself produces upper-range and flagship Xiaomi (formerly Mi) phones.

Key takeaways

Redmi belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Redmi to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Redmi from memory before moving on to harder problems.

Reference excerpt

Redmi (stylized in all caps) is a subsidiary brand owned by Chinese electronics company Xiaomi. It was first launched in July 2013 as a budget smartphone line, and became a separate sub-brand of Xiaomi in 2019 to takeover entry-level and mid-range devices originally produced by Xiaomi brand, while Xiaomi itself produces upper-range and flagship Xiaomi (formerly Mi) phones. Redmi phones use Xiaomi's MIUI (2014–2023) and Xiaomi HyperOS (2023–present) user interface on top of Android. Models are divided into the entry-level Redmi, the mid-range Redmi Note, and the high-end Redmi K. In 2022, an ultra-basic entry-level lineup, Redmi A was introduced, with some models featuring Android Go and lacking MIUI/HyperOS user interface. The Redmi K is exclusive to China and rebranded as Poco (another Xiaomi subsidiary) for select global markets. The most significant difference from other Xiaomi smartphones is that Redmi uses less expensive components, allowing lower prices while retaining more advanced specifications. In August 2014, The Wall Street Journal reported that in the second quarter of the 2014 fiscal year, Xiaomi had a smartphone market share of 14% in China; Redmi sales were attributed as a contributing factor toward this ranking. Some devices with identical specification are released in some markets as POCO, in others as Redmi; for example the Poco X7 and Redmi Note 14 Pro 5G. Redmi Note 14 SE officially arrived in India on 28 July 2025.

History

2013 The first Redmi phone Redmi (Red Rice in Mandarin), released in China in 2013, was first launched on Xiaomi's website, with consumer sales beginning on 12 July 2013. The phone was internationally released under the Redmi brand in early 2014.

2014 On 13 March 2014, Redmi announced that their phones had been sold out in Singapore alone, eight minutes after being made available to buy on Xiaomi's website. Criticism regarding the release of Redmi phones included the notion that the firm may be exaggerating its sales by releasing them in small batches, causing them to quickly sell out. On 4 August, The Wall Street Journal reported that in China's smartphone market, Xiaomi overtook Samsung in the second quarter of the 2014 fiscal year with a 14% market share in smartphone shipment rankings, while Samsung had a 12% market share during this time. Yulong and Lenovo both had a 12% market share during this time. Redmi sales were attributed as contributing to Xiaomi's increased shipment rankings in the smartphone market. Conversely, in the first quarter of 2014, Xiaomi held a 10.7% market share.

2015 The Redmi Note 3 launched on 24 November 2015; unlike its predecessor, it does not have a user-changeable battery or microSD slot. It uses the MediaTek Helio X10 Octa-core 2.0 GHz Cortex-A53 SOC with the PowerVR G6200 GPU. The Snapdragon variant of the phone, released later the same year, is based on the Snapdragon 650 and has microSD support.

2016 In July 2016, the actors Liu Shishi, Wu Xiubo and Liu Haoran became the first ambassadors of the Redmi series in China. Redmi Pro has appeared as Pro lineup in Redmi series. On 25 August, Xiaomi unveiled the Redmi Note 4, powered by MediaTek's Helio X20 deca-core processor clocked at 2.1 GHz. The device has 2 GB RAM and 16 GB of internal storage. It has a 5.5-inch Full-HD display and a 13 MP rear camera and 5 MP front camera. It runs on Android 6.0 Marshmallow and is powered by a 4,100 mAh battery. In November, Xiaomi released its new budget phone, Redmi 4. It has a polycarbonate body, dual-SIM support and runs on MIUI 8 based on Android 6.0.1 Marshmallow. The Redmi 4 has a 5-inch 720x1280 pixels display, is powered by a 1.4 GHz octa-core processor, and has 2 GB of RAM.

2017 In January 2017, the Xiaomi Redmi Note 4x based on Qualcomm Snapdragon 625 Chipset became the company's first major launch of 2017. It is an upgraded version of the previously released Redmi Note 4 based on the MediaTek Helio X20 chipset. The device is known as Redmi Note 4 in regions where the original Redmi Note 4 was not released. In December, Xiaomi unveiled the Redmi 5 and 5 Plus. They are the first phones in the Redmi series with an 18:9 screen aspect ratio. The EU release was set to January 2018 and prices were set to €170 for the Redmi 5 and €215 for the Redmi 5 Plus.

2018 In February 2018, Xiaomi unveiled the Redmi Note 5 and Note 5 Pro. They are the first phones from Xiaomi to feature facial recognition. In May, Xiaomi unveiled the Redmi S2, also known as Redmi Y2 for Indian markets. In June, Xiaomi unveiled the Redmi 6, 6A and 6 Pro. The Redmi 6 Pro is the first phone in the Redmi series with a notch similar to the iPhone X and a 19:9 screen aspect ratio. In September, Xiaomi unveiled the Redmi Note 6 Pro. It is the first phone in the Redmi series with four cameras (two cameras on the front and two cameras on the back) and constructed using 6000 series aluminium.

… excerpt ends here. Continue reading the full article.

Illustrations

Former Redmi logo used until November 2024 in China and until March 2025 on the global market

Worked examples

Example 1 — a first encounter with Redmi

Start with the simplest possible case. Write down what Redmi claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Redmi before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Redmi ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Redmi

In research: Redmi appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Redmi in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Redmi is common in secondary-school and first-year university syllabi. It links to neighbouring topics Redmi smartphones, Smart TV, Xiaomi, so understanding it makes those chapters shorter.
In everyday life: Look for Redmi outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Redmi in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Redmi means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Redmi out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Redmi in simple terms?

Why does Redmi matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Redmi?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Redmi.