Comparison OPPO A78 128 GB vs OPPO Reno7 128 GB

The term “operating system” in this case refers to all types of firmware — both full-fledged operating systems such as iOS and Android used in smartphones, and software platforms for regular phones (non-smartphones). The main difference between these two categories is that a full-fledged OS initially has a more extensive set of functions and also allows users to install and remove various applications — from games and social media clients to specialized tools such as photo and video editors.

Among modern smartphones, two operating systems are the most widespread — Android and iOS. Here is a more detailed description of each:

— Android. A free open-source OS by Google. It is used by almost all modern manufacturers except Apple; it is available on the market in numerous versions — in particular, the current ones are Android 14, Android 15, Android 16, Android 17. It should be noted that one OS version may have been installed when the device was released, while by the time of sale it may have been updated to a newer one. Functionally, this OS is notable primarily for full multitasking support and an extensive selection of available apps — in both respects, it surpasses iOS; on the other hand, Android apps generally have somewhat lower quality due to less stri...ngent requirements. Android initially has close integration with Google services — the Google Play app and content store, Gmail email, Google Drive cloud storage, etc.; however, exceptions to this rule are possible. Note that the latest versions of this OS can be found on the market both in their original form and in one of two specific editions:

• - Go Edition. A modification of Android designed for affordable smartphones with “weak” hardware. Both the OS itself and standard apps (Assistant, Gmail, etc.) have been redesigned in this edition to ensure reliable operation even with low processing power. At the same time, developers have tried to preserve the functionality of full Android as much as possible — nevertheless, some specific features are still unavailable in Go Edition (for example, standard maps do not support turn-by-turn navigation, and compatibility with the Wear OS system on smartwatches is not provided).
• - HMS. An edition of Android used in Huawei smartphones. Due to US sanctions against China, this company cannot fully cooperate with Google — in particular, it cannot use Google services (Google Mobile Services — GMS) in its Android smartphones. HMS — Huawei Mobile Services — was introduced as a replacement. These services include a Huawei ID user identifier, the AppGallery app store, proprietary equivalents of Google's main services (assistant, browser, cloud storage, music/video, etc.), as well as tools for app developers.

As for individual Android versions, here are the main features of its variants:

• - Android 13. A popular operating system for mobile devices, the 13th version of which was released in 2022. No radical innovations were implemented in Android 13, but the OS introduced a number of useful features and changes. In particular, the Material You workspace design concept can now select primary colors from installed wallpapers or themes and apply them to icon display throughout the system. User data privacy has reached a new level — Android 13 allows configuring individual permissions and selecting specific images from the Gallery that an app can access. Users can choose the default interface language for each program. The system has also become more energy-efficient, while the clipboard and barcode scanner have been improved.
• - Android 13 Go. A lightweight version of the Android 13 operating system designed for installation on low-power smartphones. A distinctive feature of the OS is a special algorithm that optimizes the smartphone's processing power. The system also lacks some hardware-demanding functions. Android 13 Go introduced the Material You interface design concept, allowing the menu color scheme to be adapted to the installed wallpaper. The Go version inherited from the full Android 13 system the ability to grant apps permission to send notifications and the option to change the language for specific programs.
• - Android 14. An operating system for mobile devices released in 2023. Frankly, there are few system changes in the 14th version of Android, with the main focus placed on flexible interface customization. Among the new features, it is important to mention notification display via the flash or screen: a flashlight blinking pattern can now be set for each app, while a color palette for notifications can be selected for the screen. The operating system also introduced a useful option for adjusting screenshot capture, added a widget for displaying battery charge and a list of active connections, and implemented a system-level app cloning option. System fonts in the OS can be increased up to 200% of their standard size, with non-linear scaling — it is primarily applied to small text. Other improvements include enhanced system energy efficiency and cosmetic interface changes with more rounded elements.
• - Android 14 Go. A lightweight version of the Android 14 operating system for budget smartphones with limited hardware resources. The Go Edition distribution includes simplified standard apps while providing basic Android functionality with minimal performance and power consumption requirements. Despite its “lightweight” nature, Android 14 Go supports improved notifications, new controls, and privacy settings that debuted in the full 14th edition of Google's OS. However, smartphones with the lightweight Go version are not compatible with Wear OS smartwatches — this should be taken into account.
• - Android 15. The Android 15 operating system was released in 2024. Notable innovations include native support for satellite communication (for contacting emergency services or sending SOS signals), the ability to record and share only a specific app window rather than the entire screen, updated hardware extensions for camera control, enhanced control over messages, and flexible volume adjustment. The system has also traditionally received improved security features and increased energy efficiency.
• -Android 16. The 2025 version, where one of the main innovations is Live Updates dynamic notifications — they show delivery progress, trip status, or another process without requiring the app to be constantly opened. The system also automatically groups notifications from the same app, received an enhanced Advanced Protection mode, and improved hearing aid controls.
• -Android 17. The next generation of Android was officially released on June 16, 2026. The main focus is on multitasking: apps can be opened in floating Bubbles windows, quickly switched between, and expanded to full screen. It introduced improved screen recording with user reactions, an optimized gaming interface for foldable devices, and external controller button remapping. The system also received stricter access control for location and contacts, enhanced stolen smartphone locking, and memory management to improve stability and battery life.

— iOS. Apple's proprietary operating system, used only in this manufacturer's gadgets. The main advantages of iOS over Android are primarily careful optimization for specific devices (allowing good performance with relatively modest RAM capacities), overall ease and security of use, as well as high app quality. In addition, iOS updates are released regularly and are available for all devices (except clearly outdated ones that can no longer handle new system versions). On the other hand, this OS does not support multitasking and is as closed to the user as possible: in particular, apps can only be installed from the proprietary store, there is no access to the file system, and memory cards are not supported in principle.

— Harmony OS. A universal operating system by Huawei, also known as Hongmeng. It supports a wide range of devices: smart home ecosystem equipment, smartwatches, smartphones, and tablets. Harmony OS is a kind of overlay on top of Android without Google services. The app store for devices running Harmony OS is called AppGallery.

— Flyme OS. A modified version of the Android operating system used as the software platform for Meizu smartphones. The OneMind engine is responsible for OS stability. Flyme OS has no app menu, and all program icons are distributed across home screens. Distinctive features of the platform include advanced file management tools, the Aicy voice assistant, flexible mEngine vibration adjustment, Family Guardian parental control options, and a structured gallery with a convenient visual editor.

— Proprietary. This term most often refers to basic firmware installed in a regular phone (not a smartphone), usually a button phone. Such firmware has a more modest set of pre-installed programs than full-fledged operating systems; at best, this set can be expanded with universal Java-based mobile apps, while additional apps are often not supported at all. However, this cannot be called a disadvantage, given the specifics of traditional phone use.

Note that devices with other operating systems besides those described above can also be found on sale. However, most of these are either outdated models or devices with rare and uncommon types of firmware.

The maximum brightness in nits provided by the smartphone display.

The brighter the display, the more readable the picture remains on it under intense ambient light (for example, outdoors on a clear sunny day). Also, high brightness is important for the correct displaying of HDR content. However, a large amount of brightness affects the cost and power consumption of the screen. Manufacturers can specify standard, maximum, and peak brightness values. At the same time, an equal sign cannot be put between the maximum and peak brightness. The first indicates the ability of the screen to produce the specified brightness over its entire area, while the peak one — in a limited area and for a short time (mainly for HDR content).

The ratio of the screen area to the total front panel area of the phone. Simply put, this spec describes how much of the front panel is occupied by the screen; the rest is the bezels.

This indicator is given exclusively for smartphones with touch screens — it is for them that it is most relevant. The larger the percentage of the body is occupied by the screen, the thinner are the bezels, the neater the smartphone looks and the more convenient it is to work with it with one hand. As for specific numbers, the average values are 80 – 85 %, the higher values allow us to talk about a thin bezel, and more than 90 % — about a “bezel less” design.

Separately, we note that this parameter has nothing to do with the aspect ratio of the screen. The aspect ratio describes only the display itself — its proportions, the ratio between the larger and smaller side of the rectangle.

Percentage of the DCI-P3 colour model coverage by a smartphone screen.

This space has a wider range of colours than the standard sRGB "triangle". In general, the DCI-P3 colour space corresponds to the Adobe RGB model, but with a shift to red. In fact, a high coverage rate means high-quality colour reproduction of the screen and allows finer processing of the images received from the camera of a mobile device.

The type of random access memory (RAM) installed in the smartphone.

All modern devices use LPDDR format RAM ( LPDDR4, LPDDR4x, LPDDR5, LPDDR5x, LPDDR5T). In addition to its miniature size, it differs from regular computer RAM by supporting special data transfer formats (16- and 32-bit memory buses). But the versions of such memory can be different:

— LPDDR3. The earliest generation of LPDDR of the current ones — presented in 2012, implemented in devices since 2013. Standardly operates at speeds up to 1600 MT/s (megatransactions per second) and a frequency of up to 933 MHz; the “enhanced” version supports speeds up to 2133 MT/s. Nowadays, this standard is rare, mainly among outdated mobile devices.

— LPDDR4. The successor to LPDDR3, officially presented in August 2014 (although the first hardware developments were released back in late 2013). The operating speed, compared to its predecessor, has doubled — up to 3200 MT/s; the frequency has grown to 1600 MHz; and the power consumption has decreased by 40%. In addition, the data transfer format has changed — in particular, two 16-bit buses are used instead of one 32-bit, and some security improvements have been introduced into the standard. This memory can be found in some mid-range smartphones. — LPDDR4x. An improved version...of LPDDR4 with reduced power consumption — the standard uses a voltage of 0.6 V instead of 1.1 V. In addition, some improvements have been implemented in this type of RAM, aimed at increasing the speed (it reaches 4266 MT/s) and general optimization of operation — for example, a single-channel mode has appeared for undemanding applications. Thanks to such characteristics, this version of memory has become much more widespread than the original LPDDR4. It can be found in mid-range and top-end devices.

— LPDDR5. Further development of "mobile" RAM, officially announced in early 2019. The operating speed in this version has been increased to 6400 MT/s, a differential signal format has been introduced to improve resistance to interference and errors, and dynamic frequency and voltage control has been implemented to reduce power consumption. The use of such memory modules is typical mainly for high-end smartphones.

— LPDDR5x. A more energy-efficient and faster version of LPDDR5 RAM. Its data transfer rate has been increased to 8533 MT/s, and the peak throughput indicator is up to 8.5 Gbps. The number of memory banks per channel in LPDDR5x is always 16. RAM of this standard is typical for advanced smartphones of the highest grade.

— LPDDR5T. T — means "turbo". The operating speed of the LPDDR5T standard "RAM" has been increased to 9600 MT/s, and devices with such memory modules are approximately 13% faster compared to LPDDR5X. The memory operates in the low voltage range from 1.01 to 1.12 V. The corresponding modules are aimed at use in top mobile devices.

The largest volume of memory card with which the phone supports. For more information about the cards themselves, see "Memory Card Slot"; here we note that capacious cards often use advanced technologies that are not supported by all devices, and sometimes phones simply do not have enough power to process large amounts of data. Therefore, for the convenience of choosing in our catalog, the maximum supported volume is indicated.

In fact, there are cases when some devices may exceed the claimed characteristics. However, it is worth focusing on official data, because, if officially supported volume is exceeded, normal operation of the card is not guaranteed.

The test results are specified either by a younger model in a line or a particular model, made for a better understanding performance of phone models if you compare phones against these parameters. For example, the 128 GB model has test results, and the 256 GB model has no information on the network, and in both models you will see the same value that will give an understanding of the overall performance of the device. But if the editorial office has information for each model individually, then each model will have its test results filled out, and the model with bigger RAM will have bigger values.

The result shown by a device when undergoing a performance test (benchmark) in AnTuTu Benchmark.

AnTuTu Benchmark is a comprehensive test designed specifically for mobile devices, primarily smartphones and tablets. It evaluates the efficiency of the processor, memory, graphics, and input/output systems, providing a clear impression of the system's capabilities. The higher the performance, the more points are awarded. Smartphones that score over 1.5M points are considered high-performance according to the AnTuTu ranking.

Like any benchmark, this test does not provide absolute precision: the same device can show different results, usually with deviations within 5-7%. These deviations depend on various factors unrelated to the system itself, such as the device's load from third-party programs and the ambient temperature during testing. Therefore, significant differences between two models can only be noted when the gap in their scores exceeds this margin of error.

The number of individual lenses provided in the module of the main (rear) camera of the device. Specified only if there are several lenses. At the same time, each «eye» has its own sensor and, in fact, is a separate camera; however, they can be used in conjunction, forming one image from data from several lenses, or mutually complementing each other's capabilities. As an illustration of the second case, the following example can be given: when using the zoom, the smartphone can automatically switch from the main optics to the telephoto lens when the magnification selected by the user exceeds a certain threshold.

The simplest version of the main module with several lenses is a dual camera, however, devices with 3 or more rear cameras are becoming more common (in some models, the number of lenses can reach six). Anyway, these cameras usually differ in specifications and perform different functions. So, an ordinary colour camera can be supplemented with a lens for black-and-white shooting, which improves contrast; in some models, lenses with different focal lengths allow you to choose the optimal viewing angle for certain conditions; information from an auxiliary lens (see below) is usually used to adjust the depth of focus on an already finished shot, etc. These details should be clarified separately, but anyway, several lenses mean more shooting options.