Although I'm not technically a 8x8 customer, I do use 8x8 Video Meetings which is powered by Jitsi Meet. 8x8 Video Meetings seems to be a completely free and separate product from the rest of 8x8's conferencing solutions and does not require any sort of existing or new 8x8 subscription to use. From what I can tell, it just seems to be a Jitsi Meet instance running on 8x8 infrastructure with 8x8 branding tied in. See here: https://www.8x8.com/products/video-conferencing

It was possible at one point to run Android on the iPhone 2G and 3G: https://youtu.be/2N2Md2qQ4pc

Since then it doesn't really look like any progress has been made on running alternative operating systems on the iPhone.

I tried those just for kicks many years ago.

Long story short: The lack of HW acceleration made the UI (and thus everything else) extremely sluggish. It wasn't even near usable for anything you'd like to do on a regular basis.

It was a good gag to confuse co-workers with though.

I think it can be done, since there was the android on iphone project. In theory, one would need to find the Linux kernel fork that was used at the time, treat it as "vendor" kernel and start the port:

https://wiki.postmarketos.org/wiki/Porting_to_a_new_device

Regarding fancy 3D graphics: The cool thing is, that we have choice. Just pick a UI that has no high performance demand.

I knew this was coming for the past few months as the supply was dwindling and resellers were selling them for $45 (half of MSRP). Pretty disappointing since I enjoyed working with these for a project. Have to find an alternative now going forward.