Samsung Galaxy S6 edge Instruction Manual page 456

Making a call within the country
you stay
You can make a call to a land-line phone or
mobile phone in the same way as in Japan.
1
From the Home screen,
2
Enter a phone number of the other
party
3
Tap
4
Tap
Making a call to WORLD WING
user overseas
If you call to the other party who is overseas
"WORLD WING" user, even when he/she is in the
country you stay, please make an international
call to Japan.
• Regardless of in what country you stay,
the communication is always performed
via Japan. Add prefix "+" and "81" (Country
code of Japan), just like when you make an
international call to Japan, and then entering a
phone number omitting leading "0".
to end a call
International roaming
454
→ "Dial"