Originally Posted by brobb
That doesn't help much. I am looking for a simple solution, care to elaborate what you mean and provide maybe some tutorial links or articles on what you mean to accomplish what I am asking? thanks
I don't have "Software Update" option in Settings->About Phone.
Which phone are u using, normally manufacturers push out updates, for example, nexus 4 got updated from 4.3 to 4.4, it happened via OTA ( over the air ) update in which all data remains intact.
In case u want to shift to a custom rom , u can use an app called titanium backup, which will backup and restore all apps.
there is also Nandroid backup via CWM and TWRP