@mark17 I have never used 6.7-20250830-brax3, but I suspect that was a beta version of 6.7. The officially available iodeOS versions for Brax3 can be found here:
https://gitlab.iode.tech/ota/release/-/tree/master/brax3
My Brax3 originally came with v6.3-20250528, but I am now on v6.6-20250803. It looks like they removed v6.3 from the official Brax3 repository since then. I don’t know why.
If you want to revert to a previous (or any other OS, even non-Iode OS that Brax3 might support in the future), you can use the instructions at the following link. Be warned, though, that all your data on the phone will be erased. You will need to back it up. Note that some apps may not be able to be backed up, and you’ll need to reinstall them manually afterward.
Also, there are two methods they mention for manual upgrade. The spflash method is easier, in my opinion, but your only OS version choice for using the spflash method at the moment seems to be iode-6.6-20250803-brax3-spflash.zip
https://community.braxtech.net/t/how-to-manually-install-or-update-your-os-on-your-brax3/46