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Onandroid easiest method......

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http://forum.xda-developers.com – What is on android It mean on android taking a backup of your current firmware,data,cache etc. While ur phone is switched on =NO MISSING OF IMPORTANT CALLS. Just follow steps below. 1)download the apk. https://www.box.com/shared/jekoug3qrl20qx25x96s 2)install scripts in settings 3)install mkyaffs2image if while doing backup shows error due mkyaffs2image 4)done 5)u can also uninstall the app now and simply take a backup using terminal emulater You can now create a backup using terminal emulater also Just type 1)su (give su permission) 2)onandroid ALSO DOWNLOA (HowTos)