NEC UNIVERGE GT890 - Favorites; Editing favorites; To add a favorite telephone number

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 During a video call, if the video image data cannot be received 5 seconds or more, the screen
displaying calling party is changed to black.
 Before using the video function please check the whether it works correctly or not with the video test.
The video test is available in [Settings] → [Profiles] → [Profile] → [Telephone service] →[Video
Quality] → [Video test].
 When a pop-up by Android OS is displayed during a video call, it automatically switches to a voice
call.