How to update Android in Galaxy Y:

Installation guide (Updated):
Step 1 - Download Jelly Blast
ROM for Galaxy Y to your
phone.
Step 2 - Place the rom zip file in
your sd card. Do not place it in
any folders!
Step 3 - Then, turn off your
phone.
Step 4 - After your phone is
switched off, hold the Volume
Up, Home and Power button
altogether .
Step 5 - Use the volume keys to
move up and down.
Step 6 - Select apply update from
sd card, then press CWM.zip (first
download)
Step 7 - In CWM recovery, wipe
data and cache.
Step 8 - Select install zip from sd
card
Step 9 - Choose
JellyBlastGenED.signed.zip
Step 10 - Choose "Yes" (It will be
installed)
Step 11- After the rom has been
installed, reboot your phone!
Step 12- After your phone has
rebooted, you have sucessfully
updated your galaxy y to Android
4.1 Jelly Bean.
That’s it! Your Galaxy Y should
now have Jelly Bean Blast
Android 4.1 ROM installed on
your phone!