This is my first ever samsung so I'm not sure if this is normal, but the first problem I had since day one is: when the brightness is on very low, there are lines on the screen (only images/apps that have grey in it) but it doesn't show when I bring the brightness slightly up. The second issue is the speaker doesn't sound that loud until I get to maximum volume, which presents another issue of the speaker getting very hot. Are these common? and if so should I contact samsung for a replacement? I just got the phone 2 1/2 weeks ago. Otherwise I really do love this phone! Thank you.