Tablet owners Dexp often face the need to update software to eliminate security errors or obtain new system functions. This process is not always transparent, especially considering the specifics of the brand, which uses different processor platforms Rockchip or MediaTek depending on the model. Correct completion of all steps guarantees stable operation of the device and extends its service life without the need to visit a service center.
Before starting any software upgrade procedure, it is critical to assess the current state of the gadget. If your tablet works stably, there is no point in taking risks and installing third-party assemblies without a good reason. However, if you experience constant freezes or incompatibility with new versions of popular applications, updating becomes a necessity.
There are two main ways to solve the problem: automatic over-the-air (OTA) update and manual installation of the system image through recovery mode. The choice of a specific method depends on whether your specific model supports Dexp Ursus or Dexp Ixion official server updates at the moment.
Diagnostics of the current version and preparation for the procedure
The first step is to collect information about the current state of the device. You need to know exactly the build number and version Androidto understand whether there is even more recent software. Go to the settings menu and find the section About the tablet or About the device. Write down all the numbers, especially Build number and Kernel version.
After collecting data, you should free up space in the internal memory. The process of unpacking the installation package requires free space, usually at least 1–2 gigabytes. If the memory is full, the system may generate an error at the most critical moment, which will cause the process to freeze.
⚠️ Attention: Make sure that the battery charge level is at least 60-70%. A sudden power outage while writing system partitions can turn the device into a “brick”, which will require complex recovery through a programmer.
It is also worth checking the integrity of the memory card if you plan to use it to transfer the firmware file. Damaged sectors on the drive can corrupt the archive data, and checking the checksum of the file after loading will show an error. It is better to use internal memory or a new format card microSD.
Make a backup copy of all important contacts and photos before starting any manipulations with the system software, as a full reset may be inevitable.
Automatic update through the settings menu (OTA)
The safest and easiest way to get a new version of the software is to use the built-in update mechanism. Tablet manufacturers Dexp often set up servers to (push) notifications about the availability of new versions for popular models. This method minimizes the risk of human error.
To start the process, go to the Settingssection, then select System or About device. Find the line System update and click on it. The device will contact the server and check for a new version. If an update is found, the system will prompt you to download and install it.
When downloading a file of several hundred megabytes or gigabytes in size, it is recommended to use a stable connection Wi-Fi. mobile data may be unstable, and interruption of the download will require you to start the process all over again. After downloading, the installation phase will begin, during which the tablet will reboot several times.
- 📶 Make sure that the Wi-Fi signal is stable and the connection speed is high.
- 🔋 Do not press the control buttons while the download logo appears.
- 💾 Wait until the desktop is fully loaded before using it.
Sometimes servers may not respond due to technical work or discontinuation of support for a specific model. In this case, the system will report that you are using the latest available version, even if there is information on the Internet about more recent builds. This is a signal that you need to switch to manual methods.
Manual installation of firmware via Recovery Mode
If the automatic search does not produce results, you will have to resort to the local installation method. You will need to find a firmware file in the .zipformat designed specifically for your model Dexp. There are no universal firmware: trying to install an image from another model will damage the device.
The downloaded archive must be placed in the root of the internal memory or on a memory card. Do not place the file in deep folders, as the built-in recovery may simply not “see” it when scanning the drive. It is better to leave the file name as original or rename it to update.zip to simplify the search.
Next you need to enter recovery mode. For most tablets Dexp you need to turn off the device and then hold down the combination of buttons Volume up and Power. Hold them down until the logo Android or a menu with text in English appears. This menu is controlled by the volume buttons, and selection is made by the power button.
⚠️ Attention: In the Recovery menu, select the item
Wipe data/factory resetonly if you are upgrading to a radically new version of Android. Otherwise, this will lead to the deletion of all your personal data.
Select item Apply update from SD card or Apply update from internal storage. Find your firmware file and confirm installation. The process will take from 3 to 10 minutes depending on the memory speed and the amount of data being updated. Upon completion, select Reboot system now.
☑️ Checklist before flashing
Using a PC and the Rockchip Batch Tool utility
Many tablet models Dexp are built on processors Rockchip. For such devices, there is a powerful recovery and flashing tool - Rockchip Batch Tool (or analogue RKAndroidTool). This method is used when the tablet does not boot or requires a complete memory repartition.
To work, you will need a computer running Windows, a good quality USB cable and drivers. Rockchip USB Driver. Without installed drivers, the computer will not see the tablet in bootloader mode. Drivers usually come bundled with the utility or are downloaded separately from specialized forums.
Run the utility as an administrator and connect the switched off tablet by holding down the button Volume minus (sometimes Volume plus). The computer should make a sound when the device is connected. A green indicator will appear in the app, indicating that the device is in Loader ready for use mode.
| Operation stage | User action | Indicator status |
|---|---|---|
| Connection | Hold the button and insert USB | Yellow/Green |
| Downloading image | Select .img file in app | Blue (process) |
| Checking | Waiting for completion | Green (Pass) |
| Disconnection | Disconnect cable | Grey |
Select the firmware image file with extension .img in the app interface. Make sure that the checkbox next to Upgrade or Erase Flash is set correctly depending on your goals. Pressing the button Upgrade will start the process of writing data to the tablet's memory.
What to do if the drivers are not installed?
Try using a different USB port, preferably USB 2.0 (black), not USB 3.0 (blue). Also disable driver signature verification in Windows before installation.
Solving boot problems after updating
Sometimes after a seemingly successful installation, the tablet freezes at the manufacturer's logo or goes into a cyclic reboot. This phenomenon is called bootloop. Most often, the reason lies in a conflict between old user data and the new file system.
In such a situation, you need to perform a full reset (Wipe) through the Recovery menu. Enter recovery mode as described earlier and select Wipe data/factory reset, and then Wipe cache partition. This will clear partitions with user data and temporary cache files.
If resetting does not help, the firmware file may have been damaged during download or is not suitable for the revision of your board. In this case, you will have to look for a different version of the software or use the mode Maskrom (for advanced users), which requires physically closing the contacts on the board to enter the deep firmware mode.
⚠️ Attention: Recovery interfaces may differ depending on the Android version. In new versions, the menu can be touch-sensitive, while in older versions it can only be controlled by buttons. Be careful when navigating.
A long first boot after a reset is normal. The system optimizes applications and rebuilds the database. This process may take from 5 to 15 minutes. Do not try to turn off the tablet if it hangs on the logo for more than 20 minutes.
A cyclic reboot is most often solved by a full reset (Wipe Data), since the old settings conflict with the new system kernel.
Frequently asked questions and additional recommendations
Owners devices Dexp questions are often asked about the compatibility of custom firmware and the possibility of rolling back to an old version. It is important to understand that it is extremely difficult to roll back to an older version of Android due to bootloader locks and partition incompatibility. Using unofficial assemblies from enthusiasts can give a second life to an old tablet, but it deprives it of warranty and stability. Cameras may stop working, and the GPS module may lose satellites. Always weigh the risks before installing third-party software. modem And bootloader.
Using unofficial builds from enthusiasts can give a second life to an old tablet, but it voids warranty and stability. Cameras may stop working, and the GPS module may lose satellites. Always weigh the risks before installing third-party software.
Regularly checking for security updates is important, even if the Android version does not change. Security patches close vulnerabilities through which attackers can gain access to your data. Ignoring these updates makes the device vulnerable on public networks.
Can Dexp be updated from Android 4.4 to Android 10?
Officially, no. The hardware of older tablets does not support new versions of the system. Unofficially, this is only possible if there are ports from enthusiasts, but stability is not guaranteed.
What does the "Signature Verification Failed" error mean during installation?
This means that the signature of the firmware file does not match the expected system. This happens when installing custom firmware into stock Recovery. You need to either install the official firmware or install a custom Recovery (TWRP).
The tablet turned off during the update, what should I do?
Try to charge it from the mains for at least an hour. Then try entering Recovery mode. If this does not work, you will need to flash the firmware through a computer in Loader or Maskrom mode.
Where to look for official firmware for Dexp?
The official website often does not contain a firmware archive. It is better to search on specialized forums (4PDA) in threads of specific models, where users share dumps of stock systems.
Will the update delete my photos and applications?
Over-the-air (OTA) update usually saves the data. Manual installation via Recovery with the Wipe Data item will delete everything. Always make a backup copy before manual firmware.