THE SONET JOURNAL
Postmarks
Notes on travel, data, and saying it well. Thirty short lessons on eSIMs, thirty destination guides, and the tools in between.
ARTICLE · INSTALLATION
How to install an eSIM in two minutes
A step-by-step guide to installing an eSIM: what you need first, the actual install steps, and how to confirm it worked before you travel.
{n} MIN READ · 2026년 2월
Japan · FROM €26.67GUIDE · ASIA
Japan for the first time: a week that says it well
A first-timer's Japan itinerary built on restraint: three unhurried days in Tokyo, three in Kyoto, and a final day left open for Nara, Osaka or Kamakura.
OFFER · SUMMER IN EUROPE
One plan, thirty countries, zero roaming sonnets of regret.
Regional Europe eSIM. Install once, hop borders freely.
Latest lessons
eSIM education · {n} topics →Nº 30 · CHECKLISTS
The travel-day checklist
Nº 29 · INSTALLATION
After the trip: should you delete your eSIM?
Nº 28 · DEVICES
eSIM for tablets and smartwatches
Nº 27 · DEVICES
Unlocked vs carrier-locked phones
Nº 26 · DEVICES
Battery myths, tested
Tool
Will thy phone take an eSIM?
Two questions, a plain answer.
Check my phoneThe postcard · monthly
One letter a month. No spam, only stanzas.
Guides by destination
{n} destinations · All guides →
The complete index
{lessons} lessons · {destinations} destinations · {tools} tools
I. The education syllabus
II. Thirty destinations
III. Tools