Smartphones are an indispensable part of our daily lives nowadays. We use them for social networking, banking, entertainment, news alerts and many more tasks. Obviously large amount of data is aggregated day by day which includes contacted, SMS, app data etc. All this data is quite precious to the user. Once you opt for rooting the phone and eventually tweaking it either by flashing Custom ROM or any other zip package there is a great possibility of losing data. In order to avoid this we must have a thorough backup that can recover the phone if something goes wrong. Such a backup is known as Nandroid backup.
There are plenty of apps available on Play Store to perform backup tasks, both paid and free. Though they can backup data in phone, they can’t boot it up if flashing fails and you find phone dead. This is where Nandroid backup comes to our rescue. If you have it with you, the phone can be completely recovered to the original state. Then how to do it? Well, you will need to flash a custom recovery to replace your phone’s stock recovery. Two popular recovery solutions are CWM (Clockwork Mod) and TWRP (Team Win Recovery Project). Of course, your phone must be rooted to use them.
To enter recovery mode firstly phone should be switched off. Then restart the phone with pressing together Vol Up+Home+Power buttons until manufacturer’s logo appears. What you will now see is Recovery that is preinstalled which has limited functions and cannot be used for Nandroid backup. After rooting the phone the stock recovery can be changed by either flashing it through PC or by using flashable zip packages developed specifically for the phone model in question. Again you have to be careful to select recovery image designed for concerned phone model only.
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