Follow the steps below on how to place a call from the Iridium 9555 & Iridium Extreme.

Solution 1: Calling a North American number

1. Take the phone outside in the most open area possible
2. Extend and rotate the antenna so it points to the sky when against your ear
3. Wait for the phone to register, the word Registered will appear on the display
4. Press and hold the 0 key until the + appears
5. Dial the country code, area code and phone number 
• Example: + (country code)(area code/city code)(phone number)
• Example: + 1 416 253 6008

Solution 2: Calling to another Iridium phone

1. Take the phone outside in the most open area possible
2. Extend and rotate the antenna so it points to the sky when against your ear
3. Wait for the phone to register, the word Registered will appear on the display
4. Press and hold the 0 key until the + appears followed by the 8816 number
• Example: + 8816 325 12345