Field notes
From the desks of Roamingly.
Travel eSIM guides, evergreen explainers, and the occasional letter from the desk. Written by people who buy a lot of data plans.
The traveller's eSIM guide to Japan (2026)
Network coverage, regional reality, and the cheapest live plans for travelling Japan with an eSIM. Tokyo to Hokkaido, no kiosk queues.
13 May 2026 · 4 min read
Thailand eSIM: data plans for Bangkok, Phuket and beyond
How to buy the right Thailand eSIM in 2026 — Bangkok metro coverage, Phuket island reality, and live plan prices straight from our catalog.
12 May 2026 · 3 min read
What is an eSIM and how does it actually work? (2026 guide)
A plain-English explainer of how eSIMs work — at the hardware, software, and traveller level. With FAQs, network compatibility, and the gotchas nobody tells you.
11 May 2026 · 6 min read
Why we built Roamingly: a $400 roaming bill in Reykjavik
A short letter from the founder. The Iceland trip that became a $400 surprise, and what we built to make sure other travellers don't get the same one.
10 May 2026 · 3 min read