Getting ready to replace my Tracfone Motorola C155 (two keys sticking)... Does the LG600G's external display show who's calling, or do you have to flip open the phone to see who a caller is?

I assume the speakerphone is half-duplex on this model. Any praises / condemnations on how it works (ie, is there really an annoying delay)? Wish I could find a FULL-duplex Tracfone...???

Thanks!