By "alternate" I don't necessarily mean some obscure os, but any os in general , in fact I rather specifically had in mind Android or Linux. By alternate here I

By "alternate" I don't necessarily mean some obscure os, but any os in general , in fact I rather specifically had in mind Android or Linux. By alternate here I meant the fact of being able to install any you want instead of being stuck with whatever ancient Android version and Linux kernel the original came with. Ie if your phone came with an ancient Android, you should be able to without OEM support install a newer Android or a recent Linux or anything else you'd like.