Cruise connectivity 101: ports, sea days and GigSky
Why ordinary country eSIMs stop being the answer offshore, and how to plan port and at-sea connectivity separately.
Read guide →The RoamSonar blog
Practical answers for a better-connected trip. Learn how travel connectivity works, solve common problems and choose with confidence.
Start with our practical guides
eSIM vs roaming: the honest math
A worked-cost method for choosing between a travel eSIM, a roaming pass and pay-as-you-go roaming.
Read guide →Europe multi-country data: regional vs local eSIMs
A route-by-route method for comparing one regional plan with several country plans.
Read guide →How coupon pricing works on RoamSonar
Why rankings use the verified effective price, when strikethroughs appear and what to check at provider checkout.
Read guide →How to install an eSIM on iPhone and Android
A calm, device-neutral setup checklist, including the activation-policy traps that cause most arrival-day problems.
Read guide →India travel eSIM guide
Live price context, setup timing and practical data planning for city, rail and long-distance travel in India.
Read guide →Japan travel eSIM guide
Live plan context and a practical setup strategy for rail-heavy, city and regional travel in Japan.
Read guide →What “unlimited” really means: FUP and throttling decoded
How to read fair-use limits, daily resets and speed reductions without treating every unlimited plan as the same product.
Read guide →Written for travellers
Ali brings over nine years of travel and eSIM experience, including seven years running a travel agency and working with GDS platforms, flight systems and Galileo. Meet Ali →