How To : Backup Android Rom (2.3.4)

Phone must be rooted to backup rom
For Root a phone use this : ftp://shortfuse.org/SuperOneClick/Packages/SuperOneClickv2.1.1-ShortFuse.zip

Rom Manager :- https://market.android.com/details?id=com.koushikdutta.rommanager

Using Moto Defy at 2.3.4