I think in a legal sense it is yours. Heck you could even sell it, the license just requires you to provide the code if you change it. If you don't abide the license you can loose that ownership (by the legal copyright case), in a same way you could loose the ownership of your car or house in certain circumstances.
> it implies ability to control, as in control when and what gets updated as the OP is upset about.
Many routers run linux, the provider doesn't have to give you ability to control that OS, but in accordance with the copyright law they have to give you the code when you ask for it.
So in that case you own both the device and the code but you don't necessary fully control it (unless it's flashed with OpenWrt or similar).
So control and ownership are different things.
> it implies ability to control, as in control when and what gets updated as the OP is upset about.
Many routers run linux, the provider doesn't have to give you ability to control that OS, but in accordance with the copyright law they have to give you the code when you ask for it. So in that case you own both the device and the code but you don't necessary fully control it (unless it's flashed with OpenWrt or similar). So control and ownership are different things.