Below are the services with which you can send free SMS to a satellite phone
You need to specify the Iridium subscriber's phone number in international format and your contact email.
Send SMS to Iridium satellite phone
Specify the Thuraya subscriber's contact number and name that will come to the recipient along with the message.
Send SMS to Thuraya satellite phone
Specify the Inmarsat subscriber's contact number, your contact phone or email that will come to the recipient.
Send SMS to Inmarsat satellite phone
Specify the Globalstar subscriber's number, the message should not exceed 35 characters, including spaces.
Send SMS to Globalstar satellite phone