The advantage here is that unlike KIES, you can install the ROM you’ve downloaded yourself, such as from Sam Mobile.For a brief overview, you can check out any of our various tutorials on how to root your Samsung devices.We’ll show you how to do both across various devices.
Installing the ROMTo install the ROM, you’ll have to locate the specific program which is suitable for your brand of smartphone or use a custom recovery, which requires your device to be unlocked and rooted.
KIES itself downloads the firmware for you based on your device and location, so if a ROM hasn't been rolled out to your device or location, you won’t be able to install it using KIES.
Odin: Another program that allows you to install ROMs on your Samsung devices.
As with some of the other official programs, this will only install official updates for your device.
KDZ Firmware Updater: This is another program that allows you to update and flash ROMs, both official and custom, to LG devices.
Search for fw updating:
With Android, however, it can take ages to start a roll-out and even then, there are no guarantees your device will be seeing the update, or there may be issues associated with the update itself.