[throwaway81523]

There's also huge e-waste and technological regression from shutting down the 2g and 3g networks. I have several perfectly good old phones that are now useless as phones. They were better phones than current ones, because they were smaller and used much less power, through the one weird trick of not containing what we used to call workstation-class processors. I don't understand why they couldn't make the current base stations (they are SDR anyway) serve multiple standards. I had thought that was possible.

[toast0]

> I don't understand why they couldn't make the current base stations (they are SDR anyway) serve multiple standards. I had thought that was possible.

They can, but 2g and 3g are not built for sharing spectrum. They'd need to allocate a block of spectrum to each, and the minimum size blocks are too big. LTE and 5g can better share, so a block can use LTE compatible coordination with 5g for some slots and LTe for others. This should let LTE stay deployed for much longer (unless 6g can't be deployed in a compatible mode)

[coolspot]

Because radio spectrum is limited resource. They are going to reuse 2g and 3g frequencies for new protocols.