You can add new contacts as follows.
in SkyPhone > Tap 
at the upper right corner.- Enter a contact and tap
to save it.
<SkyPhone User Support Summer Holiday Closing>
The SkyPhone User Support will be closed during the following time.
Holiday Closing Time: From Wednesday, December 28, 2022 To Wednesday, January 4, 2023 (JST)
Unavailable Services: User support services (including our responses to your inquiries)
Please note that you'll be responded on January 5 (JST) or later if you contact us after 1:00 PM on December 27 (JST).
You can continue using SkyPhone as usual while our user support services are unavailable.
Thank you for your understanding and cooperation.
If you need our support, click here to contact us.
SkyPhone User Support
Business hours to reply to your message: Monday to Friday 10:00 AM to 5:00 PM (JST), except for national holidays