Question: I am currently talking on the GXP2200 but the LCD doesn't show the call screen. How can I enter the call screen again?
Answer:

During the call, users could press HOME button or Back button to have the GXP2200 display Home screen. To enter the call screen again, there are two different ways.
1. Slide down the GXP2200 top status bar and tap on the "Call status" to activate the call screen.
2. Go to GXP2200 main menu and tap on "Call" app. Select the corresponding talking line on the right hand side.