In this blog post, we will look at how smartphones have changed our lives through their structure, functions, and development process.
With the integration of functions that were previously distributed across mobile phones, computers, MP3 players, and game consoles into a single smartphone, we can now do so many things with just one small device in our hands. Smartphones offer a wide range of functions anytime, anywhere, and have become an essential tool in our daily lives. According to the latest statistics released by the Ministry of Science and ICT in 2025, the number of smartphone users in Korea is approximately 50 million, accounting for about 96% of the total population. Another survey found that as of 2025, the average daily smartphone usage time of adults in Korea is about 5.4 hours.
This means that people spend more than a third of their waking hours on their smartphones, showing that the majority of society invests a considerable amount of time and attention in these small devices. Therefore, understanding and properly utilizing smartphones is not just a matter of convenience, but an essential attitude for keeping pace with a changing society. The spread of smartphones has not only changed individual lifestyles, but has also brought about various changes throughout society.
Smartphones are no longer just a means of communication, but play a key role in various fields such as education, work, finance, and leisure. People take online classes, hold video conferences, and make payments easily through electronic wallets on their smartphones. These everyday changes have been accompanied by rapid growth in related industries, which has led to the emergence and spread of various app-based business models. At the same time, the technological infrastructure that makes up the smartphone ecosystem, such as high-speed wireless communication networks, cloud computing, and artificial intelligence (AI), has also developed rapidly, forming a new digital culture centered on smartphones.
A smartphone can be defined as a mobile phone with technology that allows its functions to be expanded by installing applications. Just as PCs use Internet browsers and document creation programs based on the Windows operating system, smartphones can also be used by installing applications compatible with operating systems such as iOS and Android. In particular, smartphones are compatible with apps that use the same operating system, allowing users to select and install only the apps they need, thereby expanding the functionality of their smartphones indefinitely. Smartphones released after the Apple iPhone began to be equipped with various sensors, which, when combined with app operation, are further increasing the usability of smartphones.
Typical examples include location, acceleration, gyro, proximity, light, fingerprint, and face recognition sensors, which are linked to various apps to enable functions such as health management, security, augmented reality (AR), and photo editing. In terms of hardware, smartphones have a structure that is as complex and sophisticated as that of computers.
The core of a smartphone is a CPU called an application processor (AP), which is a key component that controls all operations of the device in an app-centric structure. The AP integrates major computer components such as a GPU and memory controller into a single chip through a technology structure called System on Chip (SoC), enabling the system to run on a single chip without the need to connect multiple components to a motherboard as in a typical desktop computer. Thanks to this structure, smartphones can deliver high performance while maintaining a small and thin size and minimizing power consumption. The display is an output device that conveys visual information, and high-resolution OLED or LTPO panels are used to satisfy both screen smoothness and energy efficiency. RAM and ROM serve as the memory of a smartphone and play an essential role in processing and storing data. In particular, RAM capacity affects processing speed, so high-performance smartphones use high-speed memory such as LPDDR5. This means that the larger the RAM capacity, the faster the app execution and data processing speed, just as a large room allows you to quickly perform multiple tasks at the same time.
Smartphones have gone through several transitional stages to reach their current form. The PDA phone “Simon” announced by IBM in 1992 is considered the first smartphone to integrate various functions such as phone, fax, email, and schedule management. Subsequently, Nokia began to dominate the market by releasing smartphones equipped with the “Symbian” operating system in 1997. In 2007, Apple redefined the very definition of smartphones with the release of the iPhone. The iPhone played a decisive role in establishing the structure of today’s smartphones, with its touch-based intuitive user interface, use of various sensors, and app downloads through the App Store.
In particular, with the introduction of the fingerprint sensor on the iPhone 5S in 2013, security technology began to emerge as a key feature of smartphones, leading to biometric security technologies such as facial recognition and iris recognition. Apple’s efforts, along with those of Samsung Galaxy, laid the foundation for a two-strong market structure in the smartphone industry. The popularization of smartphones has not only led to technological advances, but also brought about cultural changes across society.
The rapid growth of social networking services (SNS) has gone hand in hand with the spread of smartphones. Platforms such as Facebook, Instagram, and TikTok have enabled real-time communication through smartphones, which has brought about major changes not only in the way we communicate but also in the way we consume and produce content. In an environment where anyone can become a creator, one-person media such as YouTube and short-form content have exploded, which has had a significant impact on the existing broadcasting and media industries.
As of June 2025, Android accounts for about 70% of the global smartphone operating system market share, while iOS accounts for about 29%. Symbian, which once accounted for 40% of the market share, no longer exists in the market. Chinese and Taiwanese manufacturers—Huawei, Xiaomi, Oppo, Vivo, etc.—are gradually expanding their influence in the global market by releasing smartphones with a wide range of prices and features. Meanwhile, Google has been attempting to develop a future smartphone that allows consumers to choose even hardware components through Project Ara, a “modular smartphone” project for user-customized smartphones.
As such, the smartphone market is pursuing both technological advancement and greater diversity and user experience. The Korean smartphone market has shown a unique trend in its development. Until 2009, all mobile phones were required to be equipped with a proprietary mobile platform called WIPI, which severely limited the introduction of foreign smartphones. In addition, institutional barriers such as the IMEI whitelist system required considerable costs and procedures to use smartphones manufactured overseas in Korea.
However, changes began in 2009 with the abolition of the WIPI requirement. That year, eight new smartphone models were released by SKT alone, followed by Nokia’s Symbian phones and Apple’s iPhone 3G through KT, and Motorola’s Android phone Moto Roid through SK Telecom. Nevertheless, foreign smartphones still have a relatively low market share in Korea. Experts analyze this not as a result of Korean consumers’ closed-mindedness, but rather as a result of foreign manufacturers’ passive strategies. For example, rather than localizing their products for the Korean market, foreign manufacturers are importing only a few global models and leaving marketing to domestic telecommunications companies.
In summary, smartphones have become indispensable in our lives because they are high-performance devices with electronic circuit structures similar to computers and allow users to selectively install various apps. Smartphones started out as business devices such as PDAs, but became popular through the incorporation of sensor technology and user-centered design. In the future, we can expect to see an era where users can choose their own hardware configurations. In particular, South Korea has formed a unique smartphone culture based on institutional changes such as the abolition of WIPI, rapid technology adoption, and excellent communication infrastructure. All these changes have contributed to smartphones becoming more than just electronic devices, but also economically and technologically important devices.
As of 2025, global annual smartphone sales have reached approximately 1.25 billion units, of which more than 70% are 5G-based smartphones. As a result, smartphone-based apps, games, wearable devices, and IoT technology are also rapidly advancing. Experts predict that smartphones will continue to be at the center of technological innovation, emphasizing that understanding and utilizing them will become key competencies for improving the quality of life and responding flexibly to a changing future. Smartphones are no longer just everyday tools, but have become the central axis driving the evolution of our society and civilization.
