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Re: Custom Recovery – Fundamental Conceptual Queries?
The storage medium of your device (be it an mmc, mtd, etc) is partitioned into several partitions not limited to : data, cache, system, boot and generally recovery (I say generally because some Samsung devices put the recovery image inside the boot image).
Originally Posted by sunandoghosh
Factory reset is going to wipe the data and cache partitions but it doesn't actually touch the recovery or boot partitions, because of that your recovery will remain the same in a factory reset.
Refer to the above
2. Is customer recovery part of ROM? Pls elaborate.
Never heard of it... Doing a complete backup of everything before adding custom recovery isn't directly possible in most cases. Assuming there is a valid return to stock method for your device backing up data is the only thing you really should have to worry about as it's where all your information is stored so doing a backup after root and recovery is actually fine.
3. How do one use Wugfresh toolkit or other methods which wipe off phone before backing up first time? It’s like chicken egg story. No backup without unlock and no unlock without wipe (before backup)?
What you will want to do is backup your app data in some other way (titanium backup if it will work on your device non-rooted) or similar so you can restore that data to your stock rom should you ever have to return to stock (removing the custom recovery)
Different OEMs treat the bootloader a little differently, this is a separate partition from the boot one mentioned earlier. In nearly all cases custom roms etc aren't going to touch the bootloader (this may not be the case w/ OTAs), some may direct you to replacing the bootloader in some devices but it's generally done separate from the ROM. To that end the bootloader state (locked/unlocked) generally isn't going to change if using custom ROMs etc (OTAs may be another story).
4. Is Boot loader part of ROM and once unlocked does it stay forever like that. Pls elaborate.