Update Galaxy S3 I747 to Android 5.1 Based PAC-MAN – How to

Rafia Shaikh
Posted Apr 29, 2015
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Official Pac-Man custom firmware has now been released for Android 5.1 Lollipop. Packed with a ton of features, Pac-Man has always remained one of a favorite custom ROM. Here is how to update Galaxy S3 I747 to Android 5.1 Lollipop based Pac-Man.

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Prerequisites to update Galaxy S3 I747 to Android 5.1 Lollipop:

  • Backup any important data from your Samsung Galaxy S3 SGH-I747 as a complete wipe will be required during the flashing process.
  • Enable USB debugging option on your device: Settings > Development Options > USB debugging.
  • Samsung Galaxy S3 must be rooted, unlocked and installed with a recovery tool like TWRP or CWM.
  • Your device must be charged to at least 60% of power.

Note: this tutorial is focused on AT&T Samsung Galaxy S3 SGH-I747; kindly do not try this guide on other AndroidSamsung devices.

How to update Galaxy S3 I747 to Android 5.1 PAC-MAN:

Required files: download the PacMan Android 5.1 Lollipop custom firmware for Galaxy S3 I747 from here and save it on your computer. Also download GApps package. Do not extract the contents.

  • Connect Galaxy S3 to your computer using a USB cable and copy the zip file to your phone’s SD card.
  • Disconnect the USB cord and power off your Galaxy S3.
  • Boot it into recovery mode by pressing and holding Volume Up + Home + Power buttons together.
  • Perform a Nandroid backup of your current OS: Backup backup and restore on ClockworkMod recovery.
  • Wipe data task: from CWM recovery menu, select wipe data / factory reset and confirm the process. Then go on to wipe cache partition and wipe dalvik cache.
  • From recovery menu, select install zip from sdcard followed by choose zip from sdcard. Locate the PAC-MAN Android 5.1 Lollipop custom firmware and confirm the flashing process.
  • Return back to main recovery menu and reboot your AT&T Samsung Galaxy S3 into the new custom ROM. First boot takes a good 5 minutes so please be patient.

How to restore: If you want to return to previous OS on your SGS3, boot into recovery, select backup and restore then restore your previous ROM by selecting it from the list.

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