Hereby i would like to ask some pros and other forumers to help me with this problem. I just bought a blue tube on monday and then after the day which is tuesday while i entering the contacts in my phone memory, the color of the display screen color change from grey(default) to a bit yellowish. It appear for a few seconds oni n sometime is a bit yellowish, sometimes a bit purple. Is there any solution for tis problem?? it appear in the display although i'm in other option or application such as when i using mini qwerty to enter alphabet then it suden change color but nt very often, sometimes is when entering contact. Plz help me to solve tis problem. My phone firmware is V20. Thank you.