LE SONET JOURNAL

Postmarks

Notes on travel, data, and saying it well. Thirty short lessons on eSIMs, thirty destination guides, and the tools in between.

Catégorie
Sujets
Taper
Vietnam by scooter and street stall

GUIDE · VIETNAM · DE 0,78 €

Vietnam by scooter and street stall

À LA UNE · FORMATION eSIM

What is an eSIM? A plain-language guide

No jargon. What an eSIM actually is, how it differs from a plastic SIM, and why travellers adopted it first. A plain guide before your next trip.

8 MIN DE LECTURE · MISE À JOUR FÉVR. 2026

Outil · 2 MINUTES

vérificateur de compatibilité eSIM

Consulte mon téléphone →

How to install an eSIM in two minutes

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.

3 MIN DE LECTURE · FÉVR. 2026

Japan for the first time: a week that says it wellJapan · FROM 0,78 €

GUIDE · 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.

12 MIN DE LECTUREVoir les plans Japan →

OFFRE · ÉTÉ EN EUROPE

Un seul plan, trente pays, zéro sonnet errant de regrets.

eSIM régionale Europe. Installez-la une seule fois et franchissez les frontières librement.

Consultez les offres pour l'Europe

Dernières leçons

Formation eSIM · 30 sujets →
The travel-day checklist

N° 30 · CHECKLISTS

The travel-day checklist

6 MIN →
After the trip: should you delete your eSIM?

N° 29 · INSTALLATION

After the trip: should you delete your eSIM?

4 MIN →
eSIM for tablets and smartwatches

N° 28 · DEVICES

eSIM for tablets and smartwatches

5 MIN →
Unlocked vs carrier-locked phones

N° 27 · DEVICES

Unlocked vs carrier-locked phones

5 MIN →
Battery myths, tested

N° 26 · DEVICES

Battery myths, tested

5 MIN → Toutes les leçons 30 →

Outil

Ton téléphone est-il compatible avec une eSIM ?

Deux questions, une réponse simple.

Consulte mon téléphone

La carte postale · mensuelle

Une lettre par mois. Pas de spam, uniquement des strophes.

Guides par destination

30 destinations · Tous les guides →
Vietnam by scooter and street stall
Vietnam
FROM 0,78 €
California, honestly, and only California
United States
FROM 0,71 €
Bergen to Oslo, the honest cost of the view
Norway
FROM 0,55 €

Tous les guides

30 destinations →

L'index complet

30 leçons · 30 destinations · 3 outils

I. Le programme d'enseignement

N° 01What is an eSIM? A plain-language guideWhat is an eSIM? A plain-language guideN° 02eSIM vs physical SIM: what actually changeseSIM vs physical SIM: what actually changesN° 03Is your phone eSIM compatible? The full listIs your phone eSIM compatible? The full listN° 04How to install an eSIM in two minutesHow to install an eSIM in two minutesN° 05Activate before you fly: the pre-flight ritualActivate before you fly: the pre-flight ritualN° 06Data roaming explained (and why it costs so much)Data roaming explained (and why it costs so much)N° 07How much data do you need for a week abroad?How much data do you need for a week abroad?N° 08Keep your number, carry our dataKeep your number, carry our dataN° 09Dual SIM done right: home line plus travel dataDual SIM done right: home line plus travel dataN° 10What happens when your plan runs outWhat happens when your plan runs outN° 11Topping up abroad without tearsTopping up abroad without tearsN° 12eSIM on iPhone: step by stepeSIM on iPhone: step by stepN° 13eSIM on Android: step by stepeSIM on Android: step by stepN° 14QR code vs one-tap installQR code vs one-tap installN° 15APN settings, demystifiedAPN settings, demystified
N° 16Why your eSIM shows "No service" (and how to fix it)Why your eSIM shows "No service" (and how to fix it)N° 17Hotspots and tethering on a travel eSIMHotspots and tethering on a travel eSIMN° 18eSIM security: is it safer than plastic?eSIM security: is it safer than plastic?N° 19WhatsApp, iMessage and your eSIMWhatsApp, iMessage and your eSIMN° 20Country vs regional vs global plansCountry vs regional vs global plansN° 21Two countries, one trip, one eSIMTwo countries, one trip, one eSIMN° 22eSIM on cruises and ferrieseSIM on cruises and ferriesN° 23In-flight data: myths at 30,000 feetIn-flight data: myths at 30,000 feetN° 24Business travel: receipts, VAT and expensesBusiness travel: receipts, VAT and expensesN° 25How eSIMs actually work: the tech behind the tapHow eSIMs actually work: the tech behind the tapN° 26Battery myths, testedBattery myths, testedN° 27Unlocked vs carrier-locked phonesUnlocked vs carrier-locked phonesN° 28eSIM for tablets and smartwatcheseSIM for tablets and smartwatchesN° 29After the trip: should you delete your eSIM?After the trip: should you delete your eSIM?N° 30The travel-day checklistThe travel-day checklist

II. Trente destinations

The east coast of Australia, and the distances nobody mentionsAustralia0,78 €Rio beyond Copacabana, and the city that cooks harderBrazil1,28 €Two cities and one very long drive: Canada, honestlyCanada1,12 €China, sorted before you landChina1,76 €Croatia's coast, one ferry at a timeCroatia0,55 €Cairo and the Nile, and how to haggle without the flinchEgypt0,80 €Paris beyond the postcard, and Burgundy afterFrance0,55 €Berlin, then the trains take overGermany0,55 €Greece, island by islandGreece0,57 €Iceland's ring road, and the week the weather decidesIceland0,64 €India's Golden Triangle, at your own speedIndia1,39 €Bali beyond the beach clubs, then the GilisIndonesia0,75 €
Tous 30, de A à Z →

III. Outils

vérificateur de compatibilité eSIM→
Calculateur de données
Carte de couverture