Can I backup my current ROM (Samsung modifications plus a few telco specific applications installed) before installing a custom ROM?
The best backup you can do is a
Nandroid backup. I didn't know what it was for a long time, but it works like magic. I'll include instructions, but note that i have an EVO, so they might vary a little.
- Reboot into Recovery This is different for most phones, for example, the EVO you reset while holding the `Volume Down` button. Or, since you have a rooted phone, you might be able to get to it by holding down the `Power` button, then selecting `Reboot/Recovery`.
- Once in this menu, select `Backup/Restore`
- Choose `Backup`, or a similarly named option
Flash your new rom or whatever, and if you are not pleased, simply follow the steps back to recovery and do a
Restore. This will reset your phone to it's exact settings from before, down to which widgets you had on your homescreen and what settings you had enabled and disabled.
There's an easier way than this even. I use ROM Manager, and it automatically asks you if you want to back up your current rom before installing a new one. ROM Manager also let's you install directly from your SD card, so you can do your backup, data and Davlik cache wipe, and flashing the new rom all from this app. It comes in most custom roms too.