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Inmarsat IsatPhone Prepaid Airtime: 500 Units


500 units.
12 month validity.
Airtime cost is approximately $1.31 per minute.
SMS price is $0.66 each.

SKU: INM-PRE-Pro500 Categories: , Brands: .



Airtime Reload?

If this is an airtime reload or top-up, please provide your satellite phone number or SIM number.

IsatPhone Prepaid Airtime: 500 Units

IsatPhone Prepaid Airtime: 500 Units500 units of IsatPhone airtime with a 365 day validity period. A GMN SIM card is required for all airtime purchased with GMN.

First time buying IsatPhone satellite phone airtime? Good news! We’ll waive the price of the SIM card when you purchase airtime at the same time. Please choose your preferred IsatPhone prepaid airtime card and make sure to check that you need a new SIM card.

Validity Period

365 days

Burn Rate

The burn rate for IsatPhone prepaid airtime is 1.3 units per minute. This means that for a 500 unit card, if you used the card exclusively for voice calls, you will have approximately 384 minutes of airtime and each minute will cost about $1.31 each.


The burn rate for IsatPhone prepaid airtime is 0.5 units per minute. This means that each SMS will cost approximately $0.66 each.

Compatible Equipment

This card works with the following devices:

  • IsatPhone 2
  • IsatPhone Pro

Activation Fee?

There is no activation fee! The new SIM card activation fee of $50 is waived.

Need to activate your airtime? You can do so here:

Request Airtime Activation

Inmarsat Coverage Area for IsatPhone Prepaid SIM Card

This card will give you great voice quality and satellite coverage up to 70° latitude. 

Other Inmarsat IsatPhone Prepaid Options

Need a different amount of minutes or a different validity period? Check out these different IsatPhone prepaid cards:


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Quick Airtime FAQ

When Does My Validity Period Start?

The validity period for your airtime starts when you request activation of your airtime, and the activation goes through, not when you purchase the airtime. We ship SIM cards unactivated for security purposes, so you do need to request activation of your airtime in order to start using it.

Need to activate your airtime? You can do so here:

Request Airtime Activation

How Long Does Activation Take?

Typically, activation takes only a matter of a couple of hours (or less), but sometimes there are delays in Inmarsat’s system and activation can take up to 48 hours. Just to be on the safe side, we recommend requesting activation 48 hours prior to when you will actually need the airtime, just in case there are some delays in the system.

How Can I Add More Minutes To My Airtime or Extend My Validity Period?

Adding more minutes to your airtime is very easy. Simply call or email us requesting more minutes be added to your SIM card and, as long as we have a valid credit card on file for you, we can easily add more minutes to your SIM card. Extending your validity period can be achieved by purchasing more minutes (which will extend all your minutes to the new expiration date).

If My Minutes Expire and I Need More Airtime, Do I Need a New SIM Card?

If you reach the end of your validity period, you will lose your minutes. You can add more minutes to your Inmarsat SIM card whenever you need: Inmarsat SIM cards do not ever expire.

Coverage Area for Inmarsat Airtime

The coverage area for Inmarsat airtime encompasses a large portion of the earth. Inmarsat’s satellites are geo-stationary above the earth’s equator and offer good coverage up to 70° latitude. Because the satellites are stationed above the equator, you may need to position your satellite phone’s antenna in the direction of the satellite from your location in order to get a signal.

Inmarsat Coverage Map


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