Worldwide Satellite SIM Card Development
Budget: $250 – $750 USD
I need help engineering a new SIM that gives any modern smartphone true global coverage by roaming directly onto satellite networks. This is a commercial-grade product, intended for mass deployment, so the design must be scalable, cost-efficient, and compliant with GSMA specifications. A sim card that can provide free satellite network data at no cost.
Core requirements
• Device focus: standard smartphones—no hardware mods on the handset side.
• Protocol support: 4G LTE and 5G when terrestrial towers are in range, plus a satellite-specific protocol for everywhere else. Handover between these paths has to feel seamless to end-users.
What I expect from you
1. Complete technical architecture of the SIM profile, including key files (EFs), authentication flow, and OTA update strategy.
2. RF and power-budget analysis verifying that regular smartphone modems can maintain a link budget to LEO/MEO satellites at realistic elevations.
3. Prototype provisioning server or API so we can activate, suspend, and monitor cards at scale.
4. Compliance documentation: GSMA SGP.02/SGP.22 (for eSIM), 3GPP specs for 4G/5G, and any satellite-specific standards you leverage.
5. A small test batch (physical SIM) proven on at least two Android and one iOS handset, with field test logs showing uninterrupted data sessions while moving between urban, rural, and satellite-only zones.
Acceptance criteria
• Successful over-the-air switch among 4G, 5G, and satellite links with no manual user action.
• Average latency and throughput metrics documented for each link type.
• All firmware, schematics, and source code delivered in editable form.
If you have prior work with satellite IoT, eUICC, or multi-IMSI solutions, please highlight it when you respond. I’ll be available for rapid feedback throughout the project so we can iterate quickly and get a market-ready solution.
Core requirements
• Device focus: standard smartphones—no hardware mods on the handset side.
• Protocol support: 4G LTE and 5G when terrestrial towers are in range, plus a satellite-specific protocol for everywhere else. Handover between these paths has to feel seamless to end-users.
What I expect from you
1. Complete technical architecture of the SIM profile, including key files (EFs), authentication flow, and OTA update strategy.
2. RF and power-budget analysis verifying that regular smartphone modems can maintain a link budget to LEO/MEO satellites at realistic elevations.
3. Prototype provisioning server or API so we can activate, suspend, and monitor cards at scale.
4. Compliance documentation: GSMA SGP.02/SGP.22 (for eSIM), 3GPP specs for 4G/5G, and any satellite-specific standards you leverage.
5. A small test batch (physical SIM) proven on at least two Android and one iOS handset, with field test logs showing uninterrupted data sessions while moving between urban, rural, and satellite-only zones.
Acceptance criteria
• Successful over-the-air switch among 4G, 5G, and satellite links with no manual user action.
• Average latency and throughput metrics documented for each link type.
• All firmware, schematics, and source code delivered in editable form.
If you have prior work with satellite IoT, eUICC, or multi-IMSI solutions, please highlight it when you respond. I’ll be available for rapid feedback throughout the project so we can iterate quickly and get a market-ready solution.