I have LG phone too... try GameCIH older versions newer version(s) are not working...
I use gamekiller 2.5 at the moment ...I have noticed that some cheating apps don't work on custom rom so i tried them all atleast one worked. I'm using stock at the moment. With samsung usually all cheating apps worked on custom rom. Some game have cheating protection you can't find the right values. Hex editor works or text editor editing xml etc other file types where the save data is stored.
Game data is located(i use total commander) system root /data/data then look the right game folder. Sometimes you don't need to use any cheating app at all just edit few numbers(more zeros maybe) in save file and you have lot of money etc
