Android Recovery Mode
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The Android recovery mode is a mode of Android used for installing updates. It consists of a
Linux kernel The Linux kernel is a free and open-source, monolithic, modular, multitasking, Unix-like operating system kernel. It was originally authored in 1991 by Linus Torvalds for his i386-based PC, and it was soon adopted as the kernel for the GNU ...
with ramdisk on a separate partition from the main Android system. Recovery mode can be useful when a phone is stuck in a bootloop or when it has been infected with malware.


Enablement

The way of entering recovery is different for every vendor. Examples: *
Nexus 7 Nexus 7 is a series of Android-based mini tablet computers co-developed by Google, and may refer to: * Nexus 7 (2012), the first generation * Nexus 7 (2013) The second-generation Nexus 7, also commonly referred to as the Nexus 7 (2013), ...
: Volume Up + Volume Down + Power * Samsung Galaxy S3: Volume Up + Home + Power *
Motorola Droid X The Droid X is a smartphone released by Motorola on July 15, 2010. The smartphone was renamed Motoroi X for its release in Mexico on November 9, 2010. The Droid X runs on the Android operating system, and the latest version supported was 2.3 ...
: Home + Power *
Samsung Galaxy A10s The Samsung Galaxy A10s is an Android (operating system), Android-based smartphone designed, developed and marketed by Samsung Electronics as a part of its Samsung Galaxy A series, Galaxy A series. This phone announced on August 27, 2019. The p ...
: Volume Up + Power


Features

Features of the recovery mode usually include: * Applying updates using the
Android Debug Bridge The Android Debug Bridge (commonly abbreviated as adb) is a programming tool used for the debugging of Android-based devices. The daemon on the Android device connects with the server on the host PC over USB or TCP, which connects to the cl ...
* Applying updates from the
SD card Secure Digital, officially abbreviated as SD, is a proprietary non-volatile flash memory card format developed by the SD Association (SDA) for use in portable devices. The standard was introduced in August 1999 by joint efforts between SanDis ...
* Factory resetting * Mounting partitions * Run system test


Custom recovery

The recovery that is preinstalled on Android can be replaced by other software, such as TWRP or
ClockWorkMod ClockworkMod is a software company, owned by Koushik "Koush" Dutta, which develops various software products for Android smartphones and tablets. The company is primarily known for its custom recovery image, ClockworkMod Recovery, which is used i ...
. It can include features such as: * Full backup and restore functionality * Applying unsigned update packages * USB mass storage access to SD cards * Full ADB access, with ADB running as root


See also

*
Bootloader unlocking Bootloader unlocking is the process of disabling the bootloader security that makes secure boot possible. It can make advanced customizations possible, such as installing a custom firmware. On smartphones this can be a custom Android distribu ...
*
Qualcomm EDL mode The Qualcomm Emergency Download mode, commonly known as Qualcomm EDL mode and officially known as Qualcomm HS-USB QD-Loader 9008 is a feature implemented in the boot ROM of a system on a chip by Qualcomm which can be used to recover bricked smar ...


References

{{Android Android (operating system)