I have this mobile phone for a few days now and I'm really annoyed by this green little phone that's on the display upper left. I believe it means the line y phone's using, since there's a little number 1 next to it and when I switched to line 2 there was number 2 next to little green phone. it doesn't actually do anything, it's just there and it annoyes e. Do you know to remove it? I tried everything in settings and there's no removing option...