Unless you’ve been living under a rock for the last year and a half, you probably already know about Samsung devices needing a little piece of software called Odin to seamlessly flash radios, ROMs, and other goodies onto the Galaxy line of devices. This software allows for more flexibility than just using a regular recovery image on your device. Not too long ago, XDA Senior Moderator and Elite Recognized Developer Chainfire saw the enormous inconvenience of having to be close to a PC to use this tool, so he created something to bypass this need—he created a mobile version of it.
The app is loaded with tons of features such as the ability to preserve your root even after going through OTA official updates, and much more. In its latest update (3.5), Chainfire has added an extra bits of functionality such as the ability to perform a wipe without having to flash anything (much like recovery does), support for the LTE cousins of the Galaxy S3, and includes the newest version of SuperSU (0.97), among several other code fixes and updates.
Please provide some feedback if you happen to use the app. Also, if you notice that you would like to have certain functionality, you can always request it so that the dev may add it at a later time. Happy flashing!
Mobile ODIN is the on-device firmware flasher of choice. Just throw those firmware files on your (internal or external) SD card, start Mobile ODIN and flash away.
You can find more information in the original thread.
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