Hello
friends...After a long time again getting a chance to talk on technology. My
today’s blog is for mainly two types of people. Firstly those who are newbie
like me to this technology about which i will discuss today and secondly for
those who like to play with their cell-phones and upgrading their cell-phones.
Recovery
is the feature provided to every android phone. Recovery is the concept which
deals with the restoring the data back when phone failure occurs. Recovery is
the feature which is provided in every Android phone. All Android devices ship
with a recovery environment preinstalled. This recovery software can be used to
restore the device to factory default settings, update its operating system,
and perform other diagnostic tasks.
Fig1:
Recovery mode
Before this let us first put a light on the two
mostly used recoveries. Mainly there are two types of recoveries. The ROM which
comes along with the phone i.e. they are in built such types of recovery is
called as “Stock recovery”. Android devices come with Google’s recovery
environment, which is often referred to as the “stock recovery.” Stock recovery
is also called as 3e. Stock recovery has the features like wipe cache, Dalvik
cache, reset factory settings. The stock recovery is a minimal, limited system.
It’s designed to be ignored, and it can generally only flash OTA updates and
ROMs provided by the device’s manufacturer, not third-party ROMs. Stock ROM has less functionality. For this
reason we use the ROM called as “Custom ROM”.
Fig2:
Recovery screen
A
custom recovery is a third-party recovery environment. Flashing this recovery
environment onto your device replaces the default, stock recovery environment
with a third-party, customized recovery environment. A custom recovery environment does same things
as the stock Android recovery does but in addition it provides some extra features.
Custom recoveries have the ability to create and restore device backups. Custom
recoveries allow installing custom ROMs.
Fig3: Stock Recovery screen
Although
CWM and TWRP are the two most popular custom recoveries, but other custom
recoveries may be available for some devices.
Custom recoveries mainly fall in various categories:
1) ClockworkMod Recovery (CWM):
CVM is the most widely used and popular recovery. It offers an application called as “ROM MANAGER”, which allows easily browsing and installing custom ROMs. CVM can restore and create. It is supported by most of the devices. CVM is widely used recovery.
Features of custom recovery:
1)
Fix permissions.
2)
Wipe cache, Dalvik cache.
3)
Wipe data.
4)
Reset factory settings
5)
Nandroid backup and
restore.
6)
Install zips from internal
or external sources.
7)
Used to install custom
kernels or custom ROMs.
8)
Mounting.
9)
Formatting system
partitions.
10)Preload.
How to install these custom ROMs:
Installing
ROM varies from devices to devices. It depends on the properties of the device.
Procedure for installing the custom ROM suiting your phone you can Google your
model number and name.
Fig4: ROM manager screen
Purpose of custom recovery:
Custom
recoveries are most useful while installing custom ROMs on device, as they
provide backup, restore, and ROM-flashing features you’ll need. The device boot
loader needs to be unlocked. Android offer a way to create full device backups,
although this feature is hidden and requires using an adb command. One need not
unlock the boot loader, install a custom ROM, or even root device to create or
restore a full backup.
Fig5: Custom based recovery screen
2) Team win recovery(TWRP):
Team Win Recovery project is a touch-based recovery environment. TWRP environment has a touch-based interface which one can use by tapping his fingers on on-screen buttons. TWRP even supports themes. TWRP offers ROM installation and backup features.
Fig6: TWRP based recovery
I
hope the newbie like me are aware now of the what all the Android recovery consists
of and its well known types. Last but not the least for this blog i would like
to thank my friend Sagar R Aradwad for guiding me a walkthrough by giving a
live demo of all the stages of custom recovery on my cell phone.
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