Please consult this support section for questions relating to your Iridium satellite equipment. You may also find the support section of the Iridium website of use for topics not covered on our own website:
Upgrade your Iridium GO! firmware
What is the coverage of the Iridium satellite network?
What is my Iridium phone number?
What kind of satellites does the Iridium network use?
How do I send a free text message to an Iridium phone?
How do I set-up voicemail on my Iridium phone?
How do I activate my Iridium SIM card?
How much does it cost to receive calls on an Iridium satellite phone?
How much does it cost to receive text messages from an Iridium satellite phone?
How can I lower call charges to an Iridium satellite phone?
How do I check my Iridium prepaid balance?
How do I add credit to my Iridium prepaid SIM card?
How do I know when the credit on my Iridium SIM will expire?
Can I extend the validity of my Iridium prepaid minutes?
Can I access the internet using my Iridium phone?
What do I need to connect my Iridium 9555 sat phone to a computer?
How do I upgrade the firmware on my Iridium 9555?
Iridium 9575 Extreme User Guide
Iridium 9555 User Guide
Iridium 9505a User Guide
The Iridium network is the only satellite network to cover the entire globe including the poles. View the Iridium coverage map
Your Iridium phone number is sent to you by email once SIM activation is complete. The phone number is a 12 digit number formatted as 8816XXXXXXXX. Please note phone numbers are only allocated on activation - we cannot provide phone numbers for inactive SIMs.
The Iridium satellite network consists of a constellation of 66 low-earth orbiting (LEO) satellites.
Iridium allow you to send free SMS to any Iridium phone through their website http://messaging.iridium.com.
All you need is the Iridium phone number starting 8816.
Alternatively you can send a free SMS to any Iridium phone by email.
Simply send an email to "Your Iridium Phone Number"@msg.iridium.com
Enter your message (a maximum of 160 characters applies) in the message body only. (Any text entered in the subject field is ignored) You can send a maximum of five messages in a ten minute period. Messages greater than 5 will be deleted.
For information on setting up and listening to your Iridium voicemail download the Iridium Voicemail Guide.
1. Dial your phone number for your handset
2. You will then be asked to enter your password, which is the last 7 digits of your phone number
1. Go to Menu > Voicemail > Call Voicemail
2. This will then take you straight to the Voicemail box of your SIM.
3. Press the * button to interrupt the pre-recorded message which will then ask you to enter you full phone number - 8816...
4. You will then be asked to enter your password, which is the last 7 digits of your phone number
Your Iridium SIM can be activated by contacting us with your ICCID (number beginning 898 printed on the SIM). Iridium activations are usually completed within half an hour.
It is free to receive calls on your Iridium sat phone.
It is free to receive calls from an Iridium sat phone.
It is free to receive text messages from an Iridium sat phone.
Iridium offer two services to lower call costs to Iridium phones which work by increasing the charges to the phone user.
1. Iridium +1 Access Service
The Iridium +1 Access Service has been developed to provide Iridium post-paid customers with a US base +1 phone number in addition to their Iridium phone number. This makes calling the Iridium phone simpler and less expensive.
2. Iridium 2 Stage Dialling
Iridium 2 Stage Dialling allows the caller to dial a US number and then enter the details of the Iridium number they want to reach. This means they only pay the cost of a call to the US.
You can check your Iridium pre-paid balance by calling 2888 from your Iridium phone.
Alternatively contact us for balance information.
If you purchased your SIM card from GTC just choose which prepaid vouchers you require and buy online.
When your credit was originally added you will have received a SIM Summary detailing when the credit will expire. If you have since added new vouchers this date will have changed. We can provide you with expiry dates, please contact us.
The validity of your Iridium airtime can be extended on a month by month basis - visit Iridium Pre-Paid Validity Extension for further details. Alternatively, adding new pre-paid vouchers will also extend the validity.
Yes. Iridium offers data services which allow you to access the internet by connection your phone to a computer.
The Iridium 9555 sat phone comes with a USB data cable to allow connection a computer. We also recommend you download the Iridium Direct Internet 2.0 software to benefit from enhanced data speeds.
See our guide to upgrading and download the firmware online.