I write a game where the level consists of small pieces (tiles) of size 16x16. To make the game faster I use two buffers. First I draw all the level piece on one buffer, then (when I move) I draw one buffer to other with some offset, and then draw the borders (some pieces must come onto screen). Every phone works right but not Samsung (mainly X640). I think one buffer is not drawn right onto the other, and border pieces are drawn right. The other problem is with some colors that are not drawn at all. The problem is only on Samsung device. Siemens, Sony Ericsson and Motorola work right!