[Samsung Galaxy Fit GT 5670] a.cid:
9. Nandroid Backups

Q) What are Nandroid Backups?

A) Nandroid Backups are like an exact copy image of your phone’s state, saved on your sd card. It stores all your apps, data, settings, sd-ext etc. of the phone (obviously, the state when you took the backup). Nandroid Backups are a very convenient way to restore your data after something has gone wrong (or want to change between roms), and their size can be anywhere starting from 150mb+.

If you want to test some stuff from the development section (like different mods/hacks/scripts), it is advisable to make a Nandroid Backup before you proceed...​

Q) How to make Nandroid Backups?

A) Perquisites to make a nandroid backup:

•ClockworkMod Recovery (any version) on your galaxy fit.

•Plenty of free space on your sd card (this depends on how many apps you have, my backups usually average around 450-500 MB)

Steps:

Do a clean reboot into ClockworkMod Recovery (i.e. shutdown properly, then reboot into recovery mode)

Go to “backup and restore”>”backup”

Wait for the process to get completed, and you are done!

The backup that you just made has been saved to your sd-card, in a folder named clockworkmod (complete location is /mnt/sdcard/clockworkmod/backup).

Restoring:

Now, suppose, while flashing any rom, you are stuck in a never-ending bootloop, and you have wiped everything (i.e. data, cache, dalvik cache), and just want to get back the way it was, then just follow these steps to restore:

Boot into CWM

Wipe data, cache, and dalvik cache (optional, but recommended).

Go to “backup and restore”>”restore”, and then select your backup.

Wait for it to complete (time taken depends on the size of your backup, which in turn depends on the number of apps that you had installed), and reboot

You will find that you are now back to last state before you did that backup, with all your apps, settings etc. the way it was left.

If you keep more than one nandroid backup, you may find it confusing to remember which one is what…

So you can rename them in the following way:

Suppose the default name of my backup of a cm7 rom is 2012-03-29.14.04.59 , then I can rename it as cm72012-03-29.14.04.59

In this way, if you ever get a md5 mismatch error while restoring, then you can simply edit it back to the way it was.

However, if you still get an md5 mismatch error, then you can use this method suggested by fellow xda member, arhant. Though if the backup wasn’t created by you (i.e. you took it from someone else), then exercise caution while doing this.​

10. Overclocking

Q) What is overclocking?

A) Overclocking refers to running your processor above the “safe” limit set by Samsung (or the manufacturer, in general). This limit is usually set so that the battery life is extended, less overheating problems occur as well as minimum possible damage is done to the processor in the long run.​

Why to overclock:

Helps make Fit more “usable”, i.e. makes launcher smooth, games a little less laggy etc.

Why not to overclock (Most of this happens only if you don’t overclock properly):

Poor battery life

Abnormal heating of the phone

Increased instability

Q) How to overclock (oc) Galaxy Fit?

A) In order to overclock Galaxy Fit, you need to have a custom kernel, as the stock kernel doesn’t support overclocking, as well as root access.

Note: Stock roms can be overclocked! They just need another kernel, the in-built kernel cannot be overclocked.

• If you want to overclock on stock (at your own risk), you can flash any kernel from this via cwm (so, obviously you need cwm, stock recovery won’t do).

• Most custom roms have oc kernel in-built, so you usually don’t need to flash anything extra.

After you have a custom overclock-able kernel, you just need to install either No-frills CPU Control or SetCPU for Root Users (No-frills is free :) ) or any other such app, run them, and select the desired max frequency, governor, and i/o scheduler. (Don’t set the max frequency above 800+ mhz, unless you know what you are doing)

You have to use trial-and-error to find out the combination of governor, i/o scheduler, and max frequency, which suits your need…and you will get different results on different kernels, roms and basebands, so keep experimenting.​

11. Bricked phone

Q) What do you mean by a "bricked" phone??

A) A "bricked" phone is a phone which cannot start normally, AND cannot be rebooted into both, the recovery mode as well as the download mode...thus, effectively, it becomes just a paperweight, i.e. a brick :p

It is more of a "state" your phone can go into, if you do things wrong...​

If your phone can enter recovery mode OR download mode, then it is not bricked!

You can try and fix it yourself!​

If your phone can enter recovery mode, (and assuming you have a custom recovery installed), then you simply have to flash any custom rom to get your phone back in working condition.

If your phone can enter download mode, then you can install any stock rom (via odin), to get back your phone in working condition.

Note: These solutions are general in nature, i.e. they will work for the majority of cases, but may not work for some.​

HOWEVER, IF YOUR PHONE IS BRICKED,

Then there is nothing much that we can do...only the samsng service center will be able to repair it (they replace the motherboard).​