CM9 Install Guide

Note: You are strongly advised to read the CM9 Status, guides on this site and these instructions carefully before proceeding.  CM for Epic is provided with no warranty.  You are installing this software at your own risk.  You may be violating your warranty.  We are not affiliated with Sprint or Samsung.

Download CM9 and gapps-ics zips and put in /sdcard
  • CM9 Stable []
  • gapps
    • gapps version 20120429 md5sum 7c524e1e078164f681e0aa6753180b2c.  Be sure to verify the md5sum to be sure you got the right one.
Before you Install CM9: Preparation
  1. Install AppBak from Market, run it and save a list of all your apps.
  2. Install SMS Backup and Restore from Market, run it and backup your SMS history.
  3. Install Call Logs Backup and Restore from Market, run it and backup your call log history.
  4. Boot into CWM5 recovery.  Make a full Backup.  You will need this backup later if you decide to go back to your previous ROM and data.
Wipe Everything 
WARNING: Currently CM9 does not tolerate CM7 or other /data.  Many apps will Force Close crash if you restore data from a previous ROM.

  1. Use CWM5.  ACSRecovery is reported to cause broken CM9 installations.
  2. Wipe everything.
  3. Flash update*.zip.
  4. Flash gapps*.zip.
  5. Reboot phone
  6. After you setup your Google account, reinstall the three apps from Market in order to restore most of your apps, call log and SMS history.
  7. Warning: Do not restore backup data of system apps!
    • If you restore a bad backup with cached settings in telephony.db in data/data/com.*.*.telephony it can break MMS.
    • It seems that restoring backups can also break Calendar sync.
Upgrades Upgrades from previous versions of CM9 are the same process as install, except you do not need to wipe anything.  Contrary to popular belief, you do not need to even wipe cache and dalvik-cache when upgrading between CM9 versions.  You only need to wipe if you are doing a major upgrade, switching to a different ROM entirely, or attempting to fix bugs caused by bad backups, 3rd party mods, or corrupt app data. Next Steps If you appreciate our work, please consider supporting the Team Epic Development Fund.