Comprehensive technical knowledge base covering 12 GSMA eSIM specifications. 84+ articles on Remote SIM Provisioning — SGP.02, SGP.22, SGP.32, SGP.41, SGP.29, SGP.23, SGP.25, SGP.26 and more.
Imagine… you’re a teacher managing 1,000 students in different classrooms. When a student finishes a task or runs into trouble, you need to know: fast! You don’t have time to check on every student yourself, so they send you report cards. IoT eSIM uses the exact same system: devices send report cards (notifications) and oops messages (errors) to the remote control centre.
Whenever something important happens on the eSIM chip, it creates a notification : like a little postcard saying what changed:
The journey of a notification:
Sending messages uses precious battery on tiny sensors. So the system has a clever trick: bundling. Instead of sending notifications one at a time, the translator waits and sends them all together: like putting multiple postcards in one envelope. One transmission, many messages!
When things go wrong, errors come in three flavours:
The translator spots a problem before it even reaches the chip: like a badly formatted message or an emergency call in progress.
The chip rejects the whole command package: maybe the signature didn’t match or the counter was too low.
The package was fine, but one specific command inside it failed: like “enable this profile” when the profile doesn’t exist.
Here’s a clever safety feature: imagine the translator executes a command (like “switch to profile B”), but then loses connection before it can report the result to the control centre. Now nobody knows what happened!
The fix? Profile Rollback : the translator tells the chip “oops, undo that last thing.” The chip reverts to its previous state, and everyone can start fresh.
If a device is making an emergency call (like eCall in a car after an accident), ALL eSIM operations are immediately blocked. Nothing is allowed to interrupt an emergency: the system returns an error called ecallActive which means “busy saving lives, try later!”
When you make an emergency call on an eSIM device, the chip blocks every single management operation until you hang up: just to make absolutely sure nothing interrupts your call for help!