Step 1: Enable the USB debugging mode on your device, for enabling the USB debugging mode navigate to Settings –> Applications –> Development.
Step 2: Extract the DDLA1 update package which you have downloaded earlier.
Step 3: Turn off your device and reboot it into download mode, to do that just press the home button (middle one) along with down volume key and press the Power button.
Step 4: Now Run Odin3 on your local computer.
Step 5: Connect your Samsung Galaxy Y 5360 phone to your computer, Odin3 will automatically detect your device. Just check for the yellow ID:COM in Odin3 (which means that the drivers are successfully loaded).
Step 6: Later in Odin3, just load the following files (PIT – totoro_0623.pit, Boot Loader – DefaultCalDataWithBoot_S5360DDLA1_REVO5.tar.md5, PDA – PDA_S5360DDLA1_REVO5.tar.md5, Phone – MODEM__S5360DDLA1_REVO5.tar.md5 and CSC – GT-S5360-MULTI-CSC-ODDLA1.tar.md5) which are available in the above downloaded packages.
Step 7: Now under “Option” in Odin3, just check “Auto Reboot” and “F.Reset Time” and uncheck rest of the selection lists.
Step 8: Everything is set to proceed further, just click on Start button to initiate the upgrade process. If everything goes fine your will be successfully updated after the reboot.
Step 9: Turn off your mobile phone and turn it on to enter into recovery mode (refer step 3).
Step 10: In recovery mode just select “Wipe Data/Factory Reset” and “Wipe Cache Partition” and reboot your device for cleaning up all the additional files which are loaded while upgrade.
Step 11: Now to confirm the update, just navigate to Settings –> About Phone –> Firmware version and notice for “Android 2.3.6 DDLA1″..