Comparison Doogee T20 Mini Pro 256 GB vs Alldocube iPlay 50 Mini Pro 256 GB

The maximum brightness in nits provided by the tablet screen.

The brighter the display, the more readable the picture remains on it under intense ambient light. Also, high brightness is important for the correct display of HDR content. However, a large margin for this indicator 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).

TÜV Rheinland certified for reduced screen emissions and good eye protection.

The model name of the processor installed in the tablet.

The processor is the “heart” of the device. It is he who is responsible for performing all the computing operations necessary for the normal operation of the tablet, and largely determines the overall performance. Knowing the name of a specific processor model, you can easily find detailed information on it, incl. and comparison with other models.

The most popular chips these days are from Qualcomm(in particular, the top solutions Snapdragon 800 series and Snapdragon 8 series), MediaTek(budget and “mid-range” MediaTek Helio processors and the line of advanced MediaTek Dimensity chipsets with 5G support), and among Windows tablets Intel processors (mainly the Intel Core family) are often found. Quite a rarity are branded Kirin processors from Huawei and Honor.

The clock speed of the processor installed in the tablet is actually the maximum number of operations performed by one processor core per second. This indicator is important for the speed of the system, but a high clock frequency in itself does not guarantee speed. The actual speed of the processor also depends on its architecture, the number of cores and many other features, and the overall speed of the device also depends on the amount of “RAM”, the installed OS, etc. Therefore, situations are not uncommon when powerful advanced tablets have a lower CPU frequency than more modest models.

Model of the graphics card installed in the tablet. The graphics card in such devices is not a separate device, but part of the processor; however, she still has a clear specialization and is responsible for graphics.

Accordingly, the graphics capabilities of the tablet directly depend on the characteristics of the video accelerator. Theoretically, knowing the name, you can find detailed specifications of a graphics card, reviews, test results and other information and evaluate how it suits you. At the same time, in most cases there is no need to delve into such details — all system components, including the graphics card, are usually selected in such a way as to correspond to the general class of the tablet and the capabilities necessary for this class.

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

All modern devices use LPDDR format RAM ( LPDDR4, LPDDR4x, LPDDR5, LPDDR5x). 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 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. — 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, this type...of RAM has some improvements 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.

— 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.

— 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 has been increased to 8.5 Gbps. The number of memory banks per channel in LPDDR5x is always 16.

The specification primarily determines the memory speed and, accordingly, the overall flow Rate of the device (especially when working with large amounts of data or resource-intensive applications). Nowadays, there are two basic specifications - eMMC (embedded Multimedia Memory Card) and UFS (Universal Flash Storage); each of them has several versions. In general, the fastest and most advanced drives today are those with UFS 3.1 and UFS 4.0, but they also cost accordingly, and therefore are used mainly in premium tablets. A more detailed description of these standards looks like this:

— eMMC. One of the simplest and most accessible solid-state memory standards — for example, this is the specification used by most flash drives. In tablets and other portable gadgets, this standard was generally accepted until 2016, when UFS began to be introduced; however, it is still quite common — mainly due to its low cost and low power consumption. eMMC speeds are noticeably lower than UFS. Thus, in the current version of eMMC 5.1A (2019), the read speed is up to 400 MB/s, and the earlier and more common version of eMMC 5.1 provides up to 250 MB/s in read mode, up to 125 MB/s in sequential write mode, and only up to 7.16 MB/s for random write (in other words, in application mode).

— UFS. A solid-state drive standard created as a faster and more advanced successor to eMMC. In addition to increased data...exchange rates, UFS also changed its operating format — it is fully duplex, meaning that reading and writing can be done simultaneously (while in eMMC these processes were performed in turns). Efficiency in random read and write mode was also significantly increased, which had a positive effect on the quality of work with applications. Specific data exchange rates and operating features depend on the UFS version; these days, the following options can be found on the market:

• 2.0. The earliest version; it was released back in 2013. Provides data transfer speeds of up to 600 MB/s on one line and up to 1.2 GB/s on two lines, the maximum available in this version. The newer version 2.1 has the same indicators, but it is supplemented with a number of important innovations. Therefore, UFS 2.0 memory is very rarely used in tablets.
• 2.1. The first of the widely used versions; it was released in 2016. In terms of speed, it is no different from the version 2.0 described above, and the main differences are in some improvements. In particular, UFS 2.1 introduced a drive status ("health") indicator, the ability to remotely update the firmware, and a number of solutions aimed at increasing overall reliability.
• 2.2. An evolution of the UFS 2.x standard, introduced in summer 2020. The key improvement is the introduction of the WriteBooster feature (originally introduced in UFS 3.1); this feature allows for a significant increase in write speed and, therefore, overall flow Rate in tasks such as launching applications.
• 3.0. Version released in 2018 and implemented in hardware a year later. The throughput was increased to 2.9 GB/s on two lines (1.45 GB/s on one), new versions of the electronic protocol M-PHY (physical layer) and UniPro based on it were implemented, the reliability of data handling was increased, and the temperature range of the controllers was expanded (in theory, it can range from -40 °C to 105 °C).
• 3.1. The successor to the UFS 3.0 standard, officially introduced in early 2020. It is positioned as a specification created specifically for high-flow Rate mobile devices and aimed at increasing operating speed while minimizing power consumption. To this end, UFS 3.1 implements a number of innovations: a non-volatile Write Booster cache to speed up writing; a special DeepSleep power-saving mode for relatively simple and inexpensive systems; as well as the Performance Throttling Notification function, which allows the drive to send signals to the control system about overheating. In addition, this standard may additionally provide support for the HPB extension, which increases the read speed.
• 4.0. UFS 4.0 doubles the bandwidth per lane (23.2 Gbps per lane) and improves power efficiency by approximately 46% (compared to the previous 3.1 specification). UFS 4.0 memory modules provide maximum read speeds of up to 4,200 MB/s and write speeds of up to 2,800 MB/s.

The largest amount of memory card with which the tablet is able to work correctly. For more information about the cards themselves, see "Memory Card Slot"; here we note that capacious media often use advanced technologies that are not supported by early models, and sometimes tablets 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 — for example, work with 8 GB of media with the claimed 4 GB of maximum capacity. However, it is worth focus on official data, because. if they are exceeded, normal operation with the card is not guaranteed.

Bluetooth version supported by the tablet.

Bluetooth itself is a technology for direct wireless communication between various electronic devices. It can be used for various purposes, in particular, exchanging files with another Bluetooth device (laptop, mobile phone), connecting wireless headphones and headsets, peripheral devices (keyboards, mice), etc. The Bluetooth connection does not require both devices to be in line of sight and is stable as they move within range. The range and additional features depend on the connection version:

• 2.0. The earliest of the Bluetooth variations used in today's tablets. Provides a data transfer rate of about 2.1 Mbps.
• 2.1. This version differs from 2.0 in a number of improvements: enhanced security, reduced power consumption and compatibility with NFC technology.
• 3.0. This version is a combination of a Bluetooth 2.1 module and a high-speed add-on that allows you to transfer data at speeds up to 24 Mbps. Thanks to this, the connection is able to automatically adapt to the situation: for small amounts of data, a slow channel is used that does not consume much energy, and for large volumes, the high-speed part is used.
• 4.0. June 2010 version. It is notable for the fact that it combines three protocols: classic, high-speed and BLE (low power consumption). The latter is the most economical at the time of release - the power consumption is so low that the CR2032 "tablet" batteries la...st for several years of operation. The data transfer rate via the BLE protocol is up to 1 Mbps. According to the classical and high-speed protocol, Bluetooth 4.0 is almost the same as version 3.0 (see above).
• 4.1. Development of the version 4.0 described above. One of the key improvements was the optimization of collaboration with LTE cellular modules in order to avoid mutual interference. In addition, it became possible to operate Bluetooth devices simultaneously in several roles (for example, to broadcast audio to a headset and remotely control another device).
• 4.2. The next, after 4.1, is a key update to the Bluetooth standard. Introduced a number of key innovations for working in the "Internet of Things" (Internet of Things), as well as general improvements in speed and noise immunity.
• 5.0. Bluetooth version 5.0, introduced in 2016. In general, it continued the trend set by the 4.2 standard, has even more extensive opportunities for working with the Internet of Things. In particular, in the Bluetooth Low Energy protocol (see "4.0" above), it became possible to double the data transfer rate (up to 2 Mbps) at the cost of reducing the range, as well as quadruple the range at the cost of reducing the speed; in addition, a number of improvements have been introduced regarding simultaneous operation with a large number of connected devices.
• Bluetooth v 5.1. Update of the version described above v 5.0. In addition to general improvements in the quality and reliability of communication, this update has implemented such an interesting feature as determining the direction from which the Bluetooth signal is coming. Thanks to this, it becomes possible to determine the location of connected devices with an accuracy of a centimeter, which can be useful when searching for various accessories - for example, Bluetooth headphones or a wireless gamepad.
• Bluetooth v 5.2. The next, after 5.1, is the Bluetooth 5th generation update. The main innovations in this version are a number of security improvements, additional power optimization in LE mode, and a new audio signal format for synchronized parallel playback on multiple devices.
• Bluetooth v 5.3. The Bluetooth v 5.3 wireless protocol was introduced at the dawn of 2022. Among the innovations, it accelerated the process of negotiating the communication channel between the controller and the device, implemented the function of quickly switching between the state of operation in a small duty cycle and high-speed mode, improved the throughput and stability of the connection by reducing the susceptibility to interference. In case of unexpected interference in the Low Energy mode of operation, the procedure for selecting a communication channel for switching is now accelerated. There are no fundamental innovations in protocol 5.3, but a number of qualitative improvements are seen in it.