>* Lockdown Mode disables javascript JIT in the browser - I want fast javascript, I use some websites and apps that cannot function without it, and non-JIT js drains battery more
This feature has the benefit of teaching users (correctly) that browsing the internet on a phone has always been a terrible idea.
I'll bite. Why is it so terrible? I'm browsing this site right now on my phone and don't see the horror.
No keyboard, no mouse, tiny screen. Every single action you'd like to take is slower and more cumbersome. Want to selection a portion of a URL? Well, get ready for an adventure. Tap the URL bar once, then -- oops, now it thinks you want to copy. You can't tap the individual sections. Try to move the little "copy bars" but oops, the press didn't register because they're tiny. Spend about a minute randomly pressing the URL bar until you can actually get the behavior your want. Or, try to switch tabs. It's not hard per se, but it's an order off magnitude slower than ctrl+tab. Or search within a page. Can you just hit ctrl+g and start typing and then press ctrl+g again? No, no, you need to enter a menu, enter a submenu, then wait for the onscreen keyboard to show up, then glide your finger over that with a few corrections, then move your finger down the the tiny next button.
It's all objectively terrible, and it accomplishes nothing except allowing the user to use the internet right then and there.
Phone networks by design track you more precisely than possible over a conventional internet connection to facilitate the automatic connection to the nearest available network. Also, for similar reasons it requires the phone network to know that it is your phone
The phone network already needs to know where your phone is to be able to route incoming calls.
Also, I don't get how the situation with your home internet connection changes much. Your ISP knows exactly where you are because your house doesn't move.
Right, but for most people you can reasonably be expected to be in your house so it isn't that big of a security risk
You don't need to connect to the internet for that. It has nothing to do with web browsing at all.
Installed apps can track you even more, so what you're arguing for is presumably not "don't use websites on your phone", but rather "do not use your phone, just use your desktop computer".
Which sure, not using your phone is more secure, but good luck convincing users that they shouldn't use any apps or websites on the go.
I think that ship has sailed.