I dl'ed a heap of .jar games for my F480i, then after installing them when i tried to run them I got a java error, "no memory available" or some such thing.
I found a code that you need to re-enter after you install new games, Ive added games in 3 lots, maybe 10 games at a time, and had to re-enter the codes once for each lot.
One code (didnt work for me)
Go to 'Internals' enter the following Master Key *#9072641*#
Go to 'Storage Settings' and click on 'Update Java DB'
Alternative code (worked for me) as its for Vodafone phones.
go to 'Internals' enter the following Master Key *#3971258*#
Go to 'Storage Settings' and click on 'Update Java DB'.
I cant recall where I got the codes from, but the 2nd one worked for me, so props go to the original poster, wherever they are.