Follow the steps below if you are unable to send a text message from the Iridium 9505A.

Step 1: Confirm that the Message Center number is programmed correctly

1. Press the Menu key, scroll to Messages and press the OK
2. Scroll  to Message Settings and press OK
3. Scroll to Service Center and press OK
4. Press and hold the C key to clear the entered number
5. Press and hold the 0 key until the + symbol appears
6. Enter 881662900005 and press OK

Step 2: Send a text message to a mobile number

1. Press the Envelope key
2. Scroll to Message Editor and press OK
3. Compose the message and press OK
4. Send Message appears, press OK
5. Enter the destination number, starting with +, then press OK

Example: If the cellular number you are sending a text message to is (212) 555 1212, you will dial +1 212 555 1212

Example: If the Iridium number you are sending a text message to is (8816) 555 12345, you will dial +8816 555 12345