Samsung Galaxy Grand is indeed one of the best Phablets launched by the brand last year. It has a large 5 inch display running on Android 4.2.2 Jellybean operating system. The phone is powered with 1GB RAM and 1.2 GHz dual core processor for smooth performance and comes with 8GB Internal storage. It is also good in cameras with 8 Megapixel rear and 2 Megapixel at the front.
Now, the device received Jellybean update couple of months ago and there is no sign of getting other update in near future because Samsung is working hard to provide Kitkat for S3, Note 2, S4 and Note 3. So, if you are bored with the same Jellybean and TouchWiz UI on your Grand, then here is something different for your Grand 19082.
You can try out he Xperia styled Custom ROM running on the same Android 4.2 Jellybean but with different UI, same as we see in Xperia smartphones. What you have to do is, download the Custom ROM from this page and go through the process provided in this Guide on Forum.