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.
You’re a car manufacturer. Before you can sell your new car, it has to pass hundreds of safety tests. Crash-test dummies get thrown into walls. Brakes get stomped a thousand times. Airbags get popped in empty parking lots. Only cars that pass every single test get to wear the “APPROVED” sticker and go on sale.
eSIMs go through exactly the same thing: but instead of crash-test dummies, there are simulator programs, test chips, and digital inspection checklists. The rulebook for all of this is called SGP.23 : a 913-page document that says: “Here is exactly how to prove every piece of the eSIM puzzle works.”
Four different pieces of the eSIM world get put through their paces:
| Test Type | What It Checks | Real-World Analogy |
|---|---|---|
| Interface Testing | Does every button and command work properly? | Checking every knob, switch, and pedal in the car |
| Behaviour Testing | Does the whole system work together end-to-end? | Taking the car for a test drive on a real road |
The interface tests check every single command: hundreds of them: one by one. The behaviour tests put them all together and say: “Okay, now download a profile from start to finish. Does it work?”
Nobody uses real customer profiles or real servers during testing. Instead, the test lab creates a complete simulated world:
This way, when they’re testing the real eUICC chip, all the other pieces are carefully controlled simulators: so if something goes wrong, they know exactly which piece is to blame.
Every eSIM component that wants to be sold in real phones goes through this journey:
The SGP.23 test specification is 913 pages long: longer than most fantasy novels! It covers over 800 test cases that four different types of eSIM components must pass before they can be used in real phones.
Kid-friendly version of GSMA SGP.23: RSP Test Specification