About Signal Archive
This website is an independent informational resource and is not affiliated with telecom operators, mobile carriers, government agencies, or official eSIM providers. Our research is produced independently and is not influenced by commercial relationships with any provider in the travel connectivity market.
Research Mission
Signal Archive was established to provide technically rigorous, independent research on the mobile connectivity landscape for European travelers. Our focus is on the infrastructure layer—the technical architecture, network partnerships, and regulatory frameworks that determine connectivity quality—rather than the consumer-facing marketing layer that dominates most travel connectivity content.
We believe that travelers making connectivity decisions deserve access to the same quality of technical analysis available to telecommunications industry professionals. Our research team brings backgrounds in telecommunications engineering, regulatory affairs, and technology journalism to produce analysis that goes beyond surface-level provider comparisons.
Research Standards
Primary Source Verification
Technical claims verified against GSMA specifications, regulatory filings, carrier technical documentation, and official standards bodies.
Commercial Independence
No payment accepted for editorial coverage, favorable placement, or sponsored content. Commercial relationships, if any, clearly disclosed.
Corrections Policy
Errors corrected promptly with dated correction notices. Reader and provider corrections welcomed at [email protected].
Uncertainty Acknowledgment
We acknowledge uncertainty where it exists. Research is dated and updated when significant changes occur in the market or technology.
Research Team
Dr. Kai Brenner
Research Director
Telecommunications engineer with 15 years in GSMA standards development and MVNO architecture research.
Lena Hoffmann
Market Analyst
Former EU telecommunications regulatory analyst specializing in MVNO market structure and roaming policy.
Marcus Veld
Technology Writer
Technology journalist covering mobile networks and consumer connectivity for European publications since 2018.