Iridium 9555 User Manual page 143

Setup
Number Entry
Phone Information
Reset to defaults
Select Back
Number Entry
Prefix with +
Prefix with 00
Do not prefix
Select Back
1
DEF
3
2
ABC
Menu
My Phonebook
SIM Phonebook
Messages
Voicemail
Data Modem
Call History
Setup
Select Back
1
3 DEF
2
ABC