What changes need to be made when the Android version is downgraded? Kernel? ROM？

try double clearing. Brushing. The method of double clearing is: after turning off the phone, press and hold the power button and the volume reduction button for about 1 seconds, and the engineering mode will appear. Select the language you need to use, click Clear Data and Cache, and choose to restart the phone.

how does p>Android refresh itself? If you refresh yourself, how do you operate it? In fact, don't make it complicated, as long as you follow the following steps, you can also brush a new system for your android phone!

first of all, let's know some terms we need to know before brushing the machine!

Brush: Simply put, brushing the Android phone is equivalent to reloading the system, which is similar to our common computer reloading system. Install a brand-new mobile phone system into the mobile phone by brushing the machine.

Recovery: the translation means recovery. As the name implies, this is a recovery mode on the mobile phone. Through this recovery, users can install the system (the so-called brush machine), clear all kinds of data of the mobile phone, partition the memory card, backup and restore and many other functions. It is similar to the one-click recovery of Ghost on a computer.

ROM: rom is the abbreviation of English Read Only Memory. In common parlance, rom is the operating system of android phone, similar to the operating systems of computers such as Windows xp and Windows7. Usually, it is said to reinstall the computer system, just take a system CD or image file and reinstall it. The same is true for the android phone. The ROM package is rewritten into the phone by brushing, and the ROM is the system package on the android phone.

wipe: wipe translates to erase, erase, etc. In recovery mode, there is a wipe option whose function is to erase all kinds of data in the mobile phone, which is similar to restoring the factory value. We often use WIPE before brushing, and you may see the prompt that you need wipe, which means clearing the data before brushing, and paying attention to backing up important things in your mobile phone before wiping.

well, after reading the explanations of these terms, do you know some technical terms of the brush machine? Let's begin to understand how Android brushes.

Back up some important contents in your mobile phone before you swipe your phone, such as business cards, text messages, calendars and other important information. If necessary, back it up first, otherwise it will be gone after you swipe your phone.

after backup, we need to download a rom package suitable for our Android phone, which is just like buying a system disk or downloading a system image on the Internet before redoing the system on a computer. It should be noted that the mobile phone is not a computer after all, and everyone must download the corresponding version suitable for their mobile phone when downloading the rom. Roms of other models of mobile phones are not universal.

The preparations are all finished. First, put the downloaded rom package into the root directory of the SD card through the data cable or card reader, then rename it as update.zip

ROM package

, then turn it off, press the power-on key while holding down the Home key to enter the recovery recovery mode, and then move the trackball to the fourth item. Press the trackball to select "Flash zip from sdcard"

Flash Zip from SD Card

After entering Flash Zip from SD Card, we find the update.zip file we just renamed, and then press the trackball to select it.

SDCARD:update.zip

after selecting update.zip, the following prompt will pop up. Then press the Home small house key, and the automatic installation system will be started.

Start automatic installation

The following figure shows the installation process of the system. No other operations are needed during the installation process, and the installation can be completed after a while.

installation in progress ING

when the installation is completed, the following interface will be automatically entered, and the bottom line of Install from sdcard complete means that the installation is successful. Now choose the first Reboot system now to restart the phone, and wait a moment to experience the new Android system! (Note: it takes a long time to start the machine for the first time after the machine is refreshed, please wait patiently)

Install complete is completed!

if you encounter the failure of Android refresh, for example, you can't start the phone and enter the system after refreshing, please turn it off again, and then enter the recovery recovery mode again by the previous method, select Wipe, enter the following interface, select all items, clear all mobile phone data (like restoring factory settings), and then restart the mobile phone to enter the system. If there is still a problem, please wipe it first and then brush it again according to the previous steps.

Brush again according to the previous steps

At this point, everyone has a further understanding of how to brush Android. Is it simple? Moreover, there is no risk in reloading the system, and it will not make the mobile phone brick or break down like the legend. Even if the brush fails or the rom is not suitable, just change the rom and brush it again.