Iridium Sat Phone Top-Ups

Iridium Sat Phone Top-Ups


Top-ups for your active Iridium satellite phone prepaid SIM card.

Iridium Sat Phone Top-Ups


Iridium SIM cards start with zero balance and validity. Choose the option appropriate for your needs and you can then extend at a later date if you need to. SIM card validity can be extended by purchasing another prepaid voucher or a 30-day extension before the original expiry date.

If the validity period is not extended, your SIM card will expire and become unusable. Any minutes remaining will be lost and your SIM will enter a 270-day grace period. Within this time, you can reactivate the SIM by adding a new voucher, however, the original balance will be lost and will not be added to the new balance.

After the grace period has ended, the SIM will automatically deactivate meaning that you will need to purchase a new Iridium airtime SIM Card and pre-paid voucher.  Reactivating a deactivated card incurs the Reactivation Only charge below plus the cost of a new airtime voucher.

If you did not originally purchase your SIM card from Global Telesat Communications we will be unable to add credit to your card. However, Iridium SIM cards are free of charge so why not order a SIM card from us as well? Iridium Sat Phone Prepaid SIMs >

Frequently Asked Questions

  • How do I check the balance on my Iridium Satellite Phone?

Dial 2888 from the sat phone. If you are unable to find your balance, please contact us for an estimated balance.

  • How do I know when my balance will expire?

Once you have purchased your airtime voucher and we have added it to your SIM card, we will confirm your new expiry date via email. 

  • Where can I find the platform for sending a free message to my Iridium Satellite Phone?

The free Iridium messaging can be sent from here:

Please click here for full terms and conditions on Iridium prepaid airtime.

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Calling Rates





Minimum billable increment = 20 seconds, 20 second increments thereafter.



Tariff Details

Topping up will allow you to add purchased minutes to your existing balance and extend the existing expiration by the additional validity period up to a maximum of 24 months.  Prepaid units that have been carried over for more than three years will be expired on a daily basis from prepaid account balances. For any customer who has purchased a 3k/5k e-voucher, a four-year expiry period on units will apply.

Topping up will allow you to add purchased minutes but the validity will be extended from the date of topup and not the existing expiration date.

Latin America Voucher Coverage:

For making calls within Latin America and up to 12 nautical miles off shore.  Includes calls from Mexico, Central America, and the entire South America continent. Countries within the Caribbean are excluded from this coverage.

Canada & Alaska (Northern Lights) Voucher Coverage:

For making calls within Canada and Alaska and up to 12 nautical miles off shore.  Gives you 200 minutes when calling to US phone numbers.  Calls to other countries will be charged at 48 units per minute.

Middle East & Africa Voucher Coverage:

This option cannot be used to make calls outside these countries.  It is only for making calls from the following countries: Algeria, Angola, Benin, Botswana, Burkina Faso, Burundi, Cameroon, Cape Verde, Central African Republic, Chad, Cyprus, Democratic Republic of the Congo, Djibouti, Egypt, Equatorial Guinea, Eritrea, Ethiopia, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Jordan, Juan De Nova Island, Kenya, Kuwait, Lebanon, Lesotho, Madagascar, Malawi, Mali, Mauritania, Mauritius, Mayotte, Morocco, Mozambique, Namibia, Niger, Nigeria, Oman, Saudi Arabia, Senegal, Sierra Leone, South Africa (inc. Price Edwards Island), Turkey, United Arab Emirates, United Republic of Tanzania, Tunisia, Uganda, Zambia, Zimbabwe, plus 12 nautical miles into coastal waters

Topping up will cause all existing minutes and expiration period to be lost and replaced with the new voucher at the point of top up

This item is for reactivation of an expired SIM card only. It must be combined with an airtime voucher in order for the SIM card to function.

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