How to upgrade my samsung galaxy ace plus GT -S7500 from Gingerbread to Jellybean

How to upgrade my samsung galaxy ace plus GT -S7500 from Gingerbread to
Jellybean

I would like to know How to upgrade my samsung galaxy ace plus GT-S7500
from Gingerbread to Jellybean.?
Details are as follows
Model Number: Samsung GT-S7500
Android version: 2.3.6
Baseband Version: S7500DDME1
Kernel Version: 2.6.38.6 dpi@DELL235#1
Build Number: GINGERBREAD.DDMF2
Please help...