BlueCosmo offers a wide variety of monthly subscription and prepaid options that fit any budget and time frame.
If you're considering a satellite phone, understanding your network and airtime options is the first step. This article explains the key differences between the Iridium and Inmarsat networks and compares prepaid and monthly airtime plans, so you can choose what works best for your needs.
Contents
- Iridium vs. Inmarsat: What's the Difference?
- Monthly vs. Prepaid Airtime: Which Is Right for You?
- Available Plan Types
- Not Sure What to Choose?
Iridium vs. Inmarsat: What's the Difference?
Whether you’re going off the grid for an adventure or need dependable backup communications, the right satellite network can make all the difference. Here’s how Iridium and Inmarsat compare:
| Feature | Iridium | Inmarsat |
| Satellite Type | 66 cross-linked satellites ensure low latency and high availability |
Operates via geostationary satellites over the equator |
| Coverage | True pole-to-pole coverage, including polar regions |
Near-global coverage (excluding the polar regions) |
| Mobility |
Excellent for movement—“walk and talk” while on the go |
Best suited for stationary use |
| Advantages |
|
|
| Best For | Remote expeditions, maritime travel, aviation, disaster response, and polar use | Users in stable locations like boats, cottages, and emergency setups in regions outside the poles |
| Learn More | Inmarsat Network Information |
Monthly vs. Prepaid Airtime: Which Is Right for You?
BlueCosmo offers both monthly subscription plans and prepaid SIM cards for Iridium and Inmarsat. Here’s how they compare:
| Feature | Prepaid SIM Cards | Monthly Plans |
| Best Suited For |
Short-term or seasonal use, travel, or budget control |
Ongoing use, frequent communication, uninterrupted access |
| Benefits |
|
|
| Limitations |
|
|
| Service Expiry | Yes (30 days to 2 years, depending on the card) | No (renews monthly until cancelled) |
| Airtime Rollover | Yes (on select cards) | No (but you can still use the service at standard rates) |
| Number Retention | Expires with SIM card | You keep your number until cancellation |
| Optional Dedicated US Number | Not available | Available for both Iridium and Inmarsat plans |
| Billing | Pay in advance | Pay monthly |
| Airtime Refill Required | Yes | No |
| Call Records | Not available | Available on the monthly invoice |
Available Plan Types
You can choose between Iridium and Inmarsat, and between monthly or prepaid service, depending on your needs:
Iridium:
Inmarsat:
Not Sure What to Choose?
Here are a few scenarios to help guide your decision:
- Traveling globally, including the poles? → Go with Iridium for full global coverage.
- Staying in rural areas or offshore, outside the polar zones? → Inmarsat may be the right choice.
- Need service for a short trip or seasonal use? → Prepaid plans offer flexibility and no monthly fees.
- Using your satellite phone regularly or as a backup? → A Monthly Plan gives you consistent access and billing convenience.
If you’re unsure, our team is happy to help guide you through the decision process. You can send an email to insidesales@bluecosmo.com for personalized assistance.
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