Recovery is translated as "recovery", which is a system (engineering mode) that can be accessed through special key combinations (different manufacturers and different models) after booting. In this interface, you can directly upgrade or back up your system by using zip rom on sd card. The old version of Recovery has only three options, and can only be upgraded with the file name update.zip, and the system cannot be backed up, nor can it be upgraded with any zip file name. The new version has more options for you to operate. How to enter recovery mode? The operation of each mobile phone is different, so I won't introduce it again. We only talk about the general part of recovery. 1) main function interface Restart the system Now restart the mobile phone application SDcard:update.zip Install the update.zip upgrade package in the memory card (the refresh package must be update.zip to upgrade) Erase data/restore factory settings Erase user data and restore factory settings (an option that must be performed before brushing the machine). Erasing the cache partition clears the system cache (an option that must be performed before erasing). Install zip from SDcard Install Zip upgrade package from SD card Backup and restore (equivalent to Ghost one-click backup and restore mobile phone version) Mounting and storage Mounting and storage options Advanced settings Erase data/factory reset and erase cache partition is the legendary "double erasure". It is best to do the following before brushing the machine. Otherwise, various minor problems may occur ~ 2) Install the zip application from the sd card interface sdcard:update.zip to upgrade the Update.zip brush package in the SD card, select zip from the SD card, select the upgrade package in zip format from the SD card (this is generally selected for upgrading the brush package) and switch sig. Property verification verification signature switching script assertion script statement 3) Backup and recovery interface Backup the current system. Advanced recovery options of the system before recovery (users can select the system that was previously backed up, Then restore) 4) mount/system mount system folder mount/data mount data folder unload/cache unload cache folder unload /sdcard unload memory card mount/Sd-Ext mount memory card Ext partition format boot format system format system format data format data cache data format cacheformat sdcard format internal memory card format Sd-Ext memory card Ext partition mount U SB mass storage in recovery mode. 5) Explain in detail 5) Advanced function restart recovery restart recovery (restart the phone and re-enter recovery) Erase Dalvik cache clear virtual machine cache (which can solve some problems of program FC) Erase battery Stat. ■ Clear the battery debugging record data (you can also try the engine oil that feels that the battery is faulty). Error reporting button Test partition SD card repair permission Repair Root permission Memory card partition There are several capacities to choose from among the partition SD card options. Select the corresponding value and press the power button, and the card will be partitioned. This process is irreversible! Recovery is an essential tool for brushing machine, and it is not difficult to operate.