How to flash Vanilla RootBOX ROM for the Galaxy S3 I9300

Jelly Bean here, Jelly Bean there, Jelly Bean everywhere! We are not talking about the sugar-glazed jellied candy, we’re talking about Android 4.1.1 Jelly Bean. Custom ROMs based on Jelly Bean are

constantly being developed. Knowing thatJelly Bean is so far the fastest and smoothest version of Android, engineering a great custom ROM is hard to do, especially with demanding devotees.

XDA Developers member bajee11 has developed the Vanilla RootBOX ROM for the Galaxy S3 GT-I9300.  The ROM is based on Android 4.1.2 Jelly Bean.  Much of the code comes from the Android Open Kang Project, plus cherry-picked goodies from the CyanogenMod 10 source.  The “Vanilla” in the ROM’s name hints that this ROM is intended to give you “pure” AOKP experience.

This ROM has bugs inherited from AOKP and CyanogenMod, since the ROM is based on those two sources.  Regardless, the ROM is stable enough for use daily.

This guide shows you how to flash Vanilla RootBOX ROM for the Galaxy S3 I9300.

Warning

• The instructions in this guide are intended for use with the Samsung Galaxy S3, model number GT-I9300. Applying these instructions on another device or model may produce undesired outcomes.
• The information in this guide is provided for instructional and educational purposes only. There is no guarantee that these instructions will work under your specific and unique circumstances.
• Use these instructions at your own risk. We shall not hold any responsibility or liability for whatever happens to you or your device arising from your use of the info in this guide.
• Read and understand the whole guide first before actually performing the instructions.

Requirements

• Samsung Galaxy S3 GT-I9300 with ClockworkMod Recovery installed.
  • You can follow our guide on how to flash official ClockworkMod Touch Recovery for the Galaxy S3 I9300.
• Download the following:
  • Vanilla RootBOX ROM for the I9300 (RootBox-JB-i9300-V2.9.zip, md5sum:07a09feeb0a43b0c13abdb4ada78a5c1)
  • GApps (Google Apps) package (gapps-jb-20120726-signed.zip, md5sum: f62cfe4a827202899919fd932d5246d7)
• Backup all personal data on your phone to make sure you have a copy of your personal data (e.g., contacts, SMS, MMS, Internet settings, Wi-Fi passwords, and the like) in case the procedure in this guide erases such data.
  • For backup tips, check our guides on how to sync your data to the cloud and how to create local backups of your mobile data.

Instructions

1. Copy the downloaded Vanilla RootBOX ROM and GApps package ZIP files to the internal SD card of your phone.
2. Turn off the phone.
3. Boot your phone into ClockworkMod Recovery. To do this, press and hold down the Volume Up, Home, and Power buttons together until recovery boots.
   • NOTE: While in recovery, you may use the Volume keys to navigate and the Power button to select an item or option.
4. Create a NANDroid backup of your current ROM. Go to Backup and Restore and selectBackup on the next screen. Wait until your phone completely creates a backup of your ROM.
5. Select Wipe data/factory reset and confirm the action on the next screen.
6. Go to Mounts and Storage and select Format /system.
7. Go back to the main menu. Select Install ZIP from SD card, then select Choose ZIP from SD card.
8. Locate and select the Vanilla RootBOX ROM and confirm the installation on the next screen.
9. Once the installation is complete, flash the GApps package in the same manner as in steps 7 and 8.
10. Select Wipe cache partition and confirm the action on the next screen.
11. Go back to the main menu and select Advanced. From there, select Wipe Dalvik cacheand confirm the action on the next screen.
12. Go back to the main menu and select Reboot system now to restart your phone. It would take about 5-7 minutes to boot for the first time.

Awesome! You have successfully installed the Vanilla RootBOX ROM on your Samsung Galaxy S3 GT-I9300. Have fun exploring the great features of this ROM on your equally great Android device.