iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Both AST SpaceMobile and Starlink aim to connect ordinary mobile phones from low Earth orbit through mobile network operators, but they are pursuing different technical and commercial routes. Starlink describes its service as a space-based extension of partner carriers’ LTE networks. AST is building a wholesale cellular-broadband network around BlueBird satellites with very large phased-array antennas. The cited evidence puts Starlink’s service further along: SpaceX reported limited commercial messaging availability in two countries in February 2025, while AST said its SpaceMobile Service had not launched in a filing identified as June 2026.
How does Starlink Direct to Cell work?
SpaceX describes Direct to Cell satellites as cell towers in space. They connect with mobile network operator (MNO) partners in a way the company compares to roaming: participating operators provide LTE spectrum, and compatible phones can connect to the satellite when terrestrial coverage is unavailable. SpaceX’s February 2025 service note described partner spectrum in the 1.6–2.7 GHz range.
That design has to address a difficult radio link. A satellite is moving rapidly relative to a phone on the ground, while a standard phone has far less antenna gain and transmit power than a purpose-built satellite terminal. SpaceX identifies Doppler shift, latency and those phone limitations as engineering challenges. Its stated approach combines phased-array antennas, custom silicon and software intended to optimize the size and placement of satellite beams. These are company descriptions of the system, not results from an independent comparison.
In February 2025, SpaceX said its constellation had more than 400 satellites and reported commercial messaging availability for T-Mobile customers in the United States and One NZ customers in New Zealand. That is a dated snapshot, not a complete map of availability or features on October 4, 2026. The same note described expansion to other countries and later support for IoT, data and voice as plans.
#1 Best Overall
- Global Coverage: No Roaming Charges - Make and receive voice calls, SMS, track your position with GPS from anywhere on the globe.
- Complete Kit: Includes Inmarsat IsatPhone 2.1 satellite phone handset, Lithium-ion battery, International AC wall charger, Automobile DC charger, Holster with belt clip, Hands free earpiece, Lanyard, USB cable, USB thumb drive with documentation, Quick start guide, SIM card and 18 month warranty.
- Durable Design: Withstands dirt, dust and jets of water from every direction; IK04 shock resistance rating and an ingress rating of IP65; Operational temperature range of -20°C to +55°C.
- World Class Support: Get expert assistance from the BlueCosmo team for any satcom needs; Choose from various service options to fit your budget.
- Long Battery Life: 8 hours talk time and 160 hours standby; Lithium-ion battery provides longest lasting power for your satellite phone.
How is AST SpaceMobile different from Starlink?
AST’s plan is to build a cellular-broadband network using its BlueBird low Earth orbit satellites, then distribute service through wholesale agreements with mobile operators. Its June 2026 SEC filing described a network intended to connect directly to off-the-shelf, unmodified devices. Rather than describe the system primarily as a roaming extension to an operator’s existing LTE network, AST emphasizes large satellite arrays, beamforming and cellular broadband capacity.
Satellite antenna design
AST’s June 2026 filing describes Block 2 BlueBird satellites with phased arrays of up to approximately 2,400 square feet, designed to provide up to ten times the bandwidth capacity of Block 1 satellites. AST says the large arrays and beamforming are intended to support voice, data and video. Those figures describe design and capacity goals; they do not establish the speed or experience a subscriber will receive in a commercial service.
Network and spectrum model
AST says its network combines spectrum licensed by mobile operator partners with spectrum it holds itself. Its official network page advertises peak speeds of over 150 Mbps per coverage cell for next-generation satellites. That is AST’s stated peak capability, not an independently verified typical subscriber speed.
By contrast, SpaceX’s February 2025 description specifically says its MNO partners supply LTE spectrum for Direct to Cell and frames the integration as similar to standard roaming. The difference is one of emphasis in the companies’ stated strategies; both make mobile operators central to reaching customers.
Rank #2
- GLOBAL COVERAGE: NO ROAMING CHARGES – make and receive voice calls, SMS, track your position with GPS from anywhere on the globe – never pay roaming charges. Your coverage area is EARTH (except the extreme north and south polar regions).
- EVERYTHING YOU NEED WITH 18 MONTH WARRANTY: Inmarsat IsatPhone 2.1 satellite phone handset, Lithium-ion battery, International AC wall charger with international plugs, Automobile DC charger, Holster with belt clip, Hands free earpiece, Lanyard, USB cable, USB thumb drive with documentation, Quick start guide, SIM card & 18 MONTH WARRANTY exclusively from BlueCosmo Satellite Communications.
- RESISTS WATER AND DUST: SHOCK RESISTANT: TOUGH AND RELIABLE: IK04 shock resistance rating and an ingress rating of IP65: the IsatPhone2 can withstand dirt, dust and jets of water from every direction. It has a humidity tolerance of 0 to 95%, and an operational temperature range of -20°C to +55°C (-4°F to +131°F). An innovative transflective display technology provides enhanced daytime visibility. Longest lasting batteries of any satellite phone with 8 hours talk time and 160 hours standby.
- WORLD CLASS SUPPORT AND SERVICE: When you purchase your IsatPhone 2 satellite phone from BlueCosmo, you get a team of professionals who have been deploying satellite communications around the world for the most demanding customers since 2003. Our IsatPhone service options can fit any budget and we can get you up and running for all your critical satcom needs. Anytime. Anywhere.
How do the two strategies compare?
| Comparison | Starlink Direct to Cell | AST SpaceMobile |
|---|---|---|
| Satellite approach | Specially designed satellites described by SpaceX as cell towers in space; its February 2025 note cites phased arrays, custom silicon and software for beam placement. | BlueBird satellites with large phased arrays and beamforming; the June 2026 filing describes Block 2 arrays of up to approximately 2,400 square feet. |
| Phone and service model | Direct connection to ordinary phones through partner operators; SpaceX compares the integration to roaming. | Planned connection to off-the-shelf, unmodified devices, with service sold through wholesale operator agreements. |
| Spectrum description | Partner-provided LTE spectrum in the 1.6–2.7 GHz range, according to SpaceX’s February 2025 note. | Combination of spectrum licensed by operator partners and AST’s own holdings, according to AST. |
| Service ambition | SpaceX’s February 2025 note reported messaging availability and described IoT, data and voice as later expansion plans. | AST describes a planned cellular-broadband service intended to support voice, data and video. |
| Status in dated materials | SpaceX reported commercial messaging in the United States with T-Mobile and New Zealand with One NZ in February 2025. | A filing identified as June 2026 said the SpaceMobile Service had not launched and described beta testing and initial noncontinuous coverage as planned. |
The table compares company descriptions and dated status statements, not a head-to-head service test. The reviewed materials do not establish an independent, comparable statistic for network quality across the two systems.
Which carriers and regions are involved?
Carrier partnerships do not by themselves mean that a consumer service is active in a particular country or included in a specific plan. SpaceX’s February 2025 report named T-Mobile in the United States and One NZ in New Zealand for commercial messaging at that time; it does not establish the full current country, carrier or feature list.
AST’s 2026 SEC materials describe wholesale arrangements with AT&T, Vodafone, Verizon and Saudi Telecom Company, among others, and report partnerships with more than 60 MNOs. The same filing cites partner footprints representing more than 3 billion subscribers. Those are partnership reach figures, not AST subscribers or active satellite coverage.
For the United States, AST’s filing describes intended AT&T service in the continental U.S., excluding Alaska and Hawaii, and Verizon service “when needed” in those geographies. It also describes a ten-year agreement with Saudi Telecom Company for Saudi Arabia and key regional markets, and a Vodafone/SatCo distribution arrangement. These are contract and intended-market descriptions, not a list of retail plans currently available to sign up for.
Rank #3
- FLEXIBLE AIRTIME OPTIONS FOR GLOBAL USE - The Inmarsat IsatPhone 2 satellite phone includes a free SIM card. Before using your Inmarsat satellite phone, you must purchase an airtime plan for the SIM provided. Prepaid plans offer a set number of minutes for a one-time payment, with the option to add more anytime. Postpaid plans provide continuous service for a fixed monthly fee, ensuring uninterrupted use. We will provide information on the various plans available following your purchase.
- NEAR GLOBAL SATELLITE COVERAGE – Stay connected almost anywhere with the Inmarsat IsatPhone 2, offering reliable voice calls, SMS, and GPS tracking worldwide, excluding polar regions. Ideal for remote areas, off-grid adventures, and emergency preparedness.
- RUGGED & LONG-LASTING PERFORMANCE – Built for extreme conditions with shock, dust, and splash resistance, plus an impressive battery life of up to 8 hours talk time and 160 hours standby, ensuring dependable communication when you need it most.
- EMERGENCY & SAFETY FEATURES – Includes a one-touch assistance button to send GPS location data to emergency contacts, plus incoming call alerts even with the antenna stowed, so you're always reachable in critical situations.
- EXPERIENCED CUSTOMER SUPPORT – We have supported more than 50,000 customers across 130+ countries and our knowledgeable and friendly support team is always ready to support you, seven days a week, 365 days a year. We offer an online portal for activations, top-ups and extensions and offer a range of prepaid and postpaid airtime plans to suit any requirement.
AST’s official FAQ says it is targeting initial U.S. beta users through AT&T and Verizon, with nationwide coverage expected to be noncontinuous at first. That is a company target, not confirmation that beta enrollment is open or that any reader is eligible.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What does the rollout evidence show?
Starlink: reported commercial messaging, with the date attached
SpaceX’s February 2025 note said Direct to Cell messaging was commercially available with T-Mobile in the United States and One NZ in New Zealand. It also outlined future expansion and additional service types. Because that status statement is from February 2025, it should not be treated as a definitive account of what is offered in every market in October 2026; current availability, features and eligibility need to be confirmed with the relevant carrier.
AST: planned service and a changing spacecraft count
AST’s filing identified as June 2026 said the SpaceMobile Service had not launched and described a limited, noncontinuous service and beta testing as planned steps before rollout. Separately, the company’s 2026 materials list BB6 as launched in December 2025, BB8–BB10 in June 2026 and BB11–BB13 on August 5, 2026—13 BlueBird spacecraft launched in total by that August date. The date attached to the filing’s reported no-launch status and the later spacecraft tally should be kept distinct: launches do not, by themselves, establish that a consumer service has started.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
The same materials say BB7 reached an orbit too low to sustain operations and was de-orbited. AST described a target of approximately 45 satellites in early 2027 based on expectations at the time. That target is forward-looking; the filing identifies manufacturing, launch readiness, regulatory approvals and other uncertainties that could affect timing.
Rank #4
- Global satellite messaging: Stay connected beyond cell coverage, use ZOLEO with your smartphone to transmit text messages and e-mails over the Iridium satellite network, cellular or Wi-Fi using the lowest-cost network available (service plan required)
- Emergency SOS: Send an SOS alert with your GPS location to 24/7 emergency monitoring center if something goes wrong, or access Medical Assist for non-emergency help
- Optional Travel Risk Management Coverage: Feel more secure wherever you go with a Field Rescue Membership from Global Rescue. Affordably priced, this travel risk management add-on offers immediate medical coverage for safe extraction and transportation to the nearest capable medical facility.
- Dedicated SMS number: An assigned ZOLEO SMS number and email enables contacts to reach out directly when you're off the grid
- Check-in: Send unlimited check-ins via the ZOLEO device or app, included in your plan
Regulatory context
The FCC’s December 2024 order provides historical context for the U.S. supplemental coverage from space framework, SpaceX’s authorization context and spectrum arrangements then being sought by AST and AT&T. It predates the later status statements above, so it should not be used alone to determine current authorizations or availability.
Do the advertised performance figures show which service is faster?
No. The numbers in these materials describe different things and are not a comparable test of consumer experience.
- AST demonstration: AST’s 2026 SEC filing reports a prior peak result of 98.9 Mbps directly to a standard, unmodified smartphone. This is a reported peak demonstration result, not a typical commercial rate.
- AST next-generation claim: AST’s official network page, accessed October 4, 2026, advertises over 150 Mbps per coverage cell for next-generation satellites. It is a company-stated peak capability, not independently verified delivered performance.
- AST Block 2 design: The filing’s up-to-approximately-2,400-square-foot array area and up-to-ten-times Block 1 bandwidth capacity are design claims, not measured subscriber speeds.
- Starlink constellation snapshot: SpaceX’s February 2025 note said the constellation had more than 400 satellites at that time. This historical count says nothing by itself about current Direct to Cell availability or speed.
The cited materials do not provide an independent, like-for-like field test of AST and Starlink. A peak demonstration, a per-cell capability claim and a satellite count cannot establish which network performs better for a particular user.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →What would a subscriber need?
For the service models described by both companies, the intended device is an ordinary mobile phone rather than a dedicated satellite handset, user dish or special antenna. The important dependency is the mobile operator: service availability and eligibility depend on the participating carrier, market and applicable offering. The cited materials do not establish current plan prices or a complete carrier-by-carrier availability list, so check the operator’s current information before relying on coverage.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
