# Tachyon - ESIM - UK - please help

**URL:** <https://community.particle.io/t/tachyon-esim-uk-please-help/72194>\
**Category:** Tachyon\
**Tags:** sim, tachyon\
**Created:** [July 21, 2026, 1:44pm UTC](https://community.particle.io/t/tachyon-esim-uk-please-help/72194 "2026-07-21T13:44:44Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![agapoar](https://avatars.discourse-cdn.com/v4/letter/a/53a042/32.png) [@agapoar](https://community.particle.io/u/agapoar)\
**Post date:** [July 21, 2026, 8:13pm UTC](https://community.particle.io/t/tachyon-esim-uk-please-help/72194/2 "2026-07-21T20:13:00Z")

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Hi again,

I've spent quite a bit more time investigating this and I think I've found another user hitting what appears to be the same issue:

[https://community.particle.io/t/issues-provisioning-esim-following-latest-instructions/69652](https://community.particle.io/t/issues-provisioning-esim-following-latest-instructions/69652?utm_source=chatgpt.com)

Thomas was using Vodafone Germany rather than SMARTY UK, but the behaviour is remarkably similar. In both cases:

- The download reaches the SM-DP+ server successfully.
- Authentication succeeds.
- The failure occurs during **PrepareDownload (ES10b)**.
- The carrier requires a separate confirmation code (ePIN / 4-digit confirmation code).
- The current `particle-tachyon-ril-ctl` / `lpa` tooling doesn't appear to provide any mechanism to supply that code.

I also spent some time reverse-engineering the installed `/usr/bin/lpa` (version 0.1.6). It appears to be a Kigen sample LPA, and I couldn't find any supported mechanism for supplying a confirmation code (no command-line option, no interactive prompt, etc.). I also confirmed that running it directly against the eUICC works using the serial transport, but it still reaches the same ES10b failure.

So my question is:

**Does the Tachyon currently support downloading carrier eSIM profiles that require a confirmation code (for example SMARTY UK or Vodafone Germany)?**

If the answer is yes:

- Is there a newer `particle-tachyon-ril` or `lpa` package that supports this?
- Or is there another supported provisioning method that should be used instead of `particle-tachyon-ril-ctl esim download`?

If the answer is no, it would be really helpful to know whether confirmation-code-protected eSIMs are on the roadmap, as I suspect this will affect several European carriers.

Thanks! Hopefully Thomas's findings and mine together help narrow this down.

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_[View the full topic](https://community.particle.io/t/tachyon-esim-uk-please-help/72194)._