@TheTrench said in 2G/Edge on Ubuntu Touch and Android 11, 5G on 13+ and Lineage OS:
throw away the phone
if there is no better answer, in your place I'd try to install Android 13 and setup UT over that.
It's recommended to use Android 11 yes, but as in this time being stuck on 2G/Edge is not really satisfying as it is shut down more and more frequently, so it's worth the try IMO. The worst that can happen is that UT will not work correctly at all.
It could work because manufacturers can install a newer version of Android without updating the interface on which UT relies. As it is a possibility, not an obligation, it's not a sure thing that it will. But if manufacturers have the ability to take a shortcut to upgrade Android on their supported hardware with less work on their part, they may very well use it.