Information
About this guide
This site translates general eSIM knowledge into the specific screens, settings and limitations of an iPhone.
Datavio exists because generic eSIM advice tends to fail on the details. On iOS, the difference between a working travel setup and a stalled one is often a single entry in Cellular settings, and that entry is rarely mentioned in provider instructions.
What is covered
The guide covers device support and regional variants, carrier lock, the three installation routes in iOS, line routing for data and voice, transfer to a new device, and an ordered troubleshooting routine that avoids destructive steps.
Each section names the settings path it refers to, so a reader can verify the instructions while holding the phone. Where Apple changes labels between releases, the text describes the function as well as the label.
Who it is for
Readers who travel with an iPhone and want a travel data plan that works on arrival, without reading a provider's help centre at a baggage carousel. The content assumes familiarity with the Settings app but not with mobile networking terminology.
It is not a buyer's guide. No provider, plan or price is recommended, and no statement here should be read as an endorsement of a particular service.
Independence and limits
This website is not affiliated with Apple, with any mobile network operator or with any eSIM provider. Device names are used descriptively. Information about models and menus is written from public manufacturer documentation and general platform behaviour, and must be verified against the current documentation for the exact model and region.
The guide cannot diagnose an individual device fault and does not replace Apple Support or a carrier's technical support. Where a problem is likely to be hardware-related, the text says so rather than offering further settings to change.
Corrections and suggestions are welcome once the operator has configured a contact address. The contact page explains what information to include.