If you’re an avid Android “rooter” and “ROM flasher,” then I’m sure the Nandroid backup feature that custom recoveries offer has been your best friend. It’s essential to perform a Nandroid backup before you wipe and flash your newly desired ROM in case something goes wrong and you need to restore your phone into a previously working state.
If you’re not familiar with how a traditional Nandroid backup works, you are required to turn the phone off and boot into the recovery to perform the procedure. A typical Nandroid backup takes about 4-6 minutes, thus your phone would be nonoperational for that period of time. An XDA developer by the name of ameer1234567890 found that troublesome as he would constantly miss important calls and texts from his family and took it upon himself in creating away to perform a Nandroid backup without having to boot into recovery. Online Nandroid Backup allows the user to perform a Nandroid backup without the need to turn your phone off, thus you won’t miss important calls or texts.
Using the program is actually fairly simple and easy to follow:
1. Rooted android phone
2. A terminal emulator installed on phone
4. A working CWM based recovery installed
5. Some patience
1. Download and copy zip file to SD card
2. Reboot into recovery
3. Choose install zip from SD card, select zip and flash .
1. Open terminal emulator
2. Type su to obtain root
3. Type onandroid
4. Wait and watch
While this is a wonderful idea, I would still personally recommend performing a Nandroid backup the old fashioned way (through recovery), simply because this is still new and bugs may be present. Either way, this is a great tool and I commend the developer for creating something that is useful for many.
You can head over to the source link for further instructions and download links if you’re interested in giving this a shot!
source: XDA Developers