Some java game offline require player send SMS to buy things or activate game, such some China RPG game or Vietnamese game, even Tankzor...
I will give you a simple way to disable SMS system of java game by your phone.
The tool you need is Explorer3.77, you can down here .
*1: Download java game by UCweb, dont install, let choose save it with the extend is .zip ( If you download by your PC, rename the extend from .jar to .zip and move it into your phone disk) .
*2: Open Explorer3.77 ( it is a java program and run by your java phone), open the folder which contain game (.zip file just downloaded), select it ( hilight, not open), choose Menu ---> Game ----> Crack, wait a moment, if succeed, it will creat a new file with the extend is ".jardata" in same folder. Rename it and delete the extend ".jardata".
*3: Close Explorer3.77, open the folder contain new file which just created by phone browser, rename it with the extend .jar , play and enjoy!!!
Some game for you to try this:
Sasuke, game Vietnamese
Boom, game Vietnamese
Dragon Force, game China
U can try it with game Tankzor.