Hello Particle Community,
I'm working with a Tachyon board (QCM6490-based) and encountering an eSIM restriction issue. I'm hoping to get some guidance from others who may have experience with similar situations.
## My Situation
- I have a Tachyon SBC with the QCM6490 module soldered on
- The device appears to be locked to Particle's eSIM only (ICCID restricted)
- I'd like to use alternative connectivity options for my specific use case
## What I'm Looking For
1. Has anyone successfully reflashed a Tachyon with generic QCM6490 firmware?
2. Are there accessible test points for EDL mode or JTAG on the Tachyon board?
3. Is there documentation for the partition layout and firmware structure?
4. Can the eSIM profile be modified without replacing the entire firmware?
## Technical Details I Have
- QCM6490 8-core Kryo 670 CPU
- 5G sub-6GHz and Wi-Fi 6E capable
- unbutu 20.04 version": "1.0.167”
## What I've Tried
Configuration inside the modem from terminal
I understand this involves low-level modifications. I'm comfortable with the technical complexity and have experience with Qualcomm tools (QFIL/QPST). Any insights into the Tachyon's firmware architecture or bootloader access would be greatly appreciated.
Thanks in advance for any guidance!