Is there anyway to find these older ROMs for flashing? I had this build running on my older L521, reset it for a temp childs phone, then tried to get Win 10 back on it. I know the device is unsupported for new builds, but it def ran 10586. I've done all the setup I've always done, but it eventually claims there are no updates avail. I've tried fast ring, slow, and rel preview. I'm assuming that the build is no longer avail directly*from any insider repositories,*but it'd be nice to play with it again.
I would just put it on my current L640, but I need T-Mo Wi-Fi calling inside*our house and it is not working on Win10.