Will replacing the camera fix white balance?

I notice a same problem with my camera phone (granted, it's a Samsung Solstice, not an iPhone 4). Given the fact that the sensor is so small, my guess would be that the camera has a hard time capturing images at the two extreme ends of the spectrum: too much or too little light. I am not a camera expert though, so perhaps someone who is will tell you if I'm right or wrong. Long story short, to me it sounds like it's something that can't really be fixed unless you use a real camera.