Follow the steps below on how to adjust the ringer volume on the Iridium 9555.

Solution 1: Adjusting call volume

1. Press “Menu”
2. Scroll to “Setup” and press the “Select” key
3. Scroll to “Volume and Tones,” press the “Select” key
4. Scroll to “Speaker Volume” and press the “Select” key
5. Use arrow keys to adjust, press the “OK” key when complete

FAST METHOD: USE THE ARROW KEYS ON THE LEFT SIDE OF THE PHONE DURING A CONVERSATION TO ADJUST VOLUME

Solution 2: Adjusting ringer volume

NOTE: This can be done at anytime

1. Press the ‘up’ and ‘down’ arrow buttons located on the left hand side of the phone to adjust the ringer volume 
2. Whatever volume setting you adjust to becomes the default