I think that using gecko based browsers like Firefox is the best thing to do in the short term. But having no competition is a bad thing. So supporting new web engines, like Ladybird, is important too: https://github.com/LadybirdBrowser/ladybird

And there is still the 14 eyes agreement

It doesn't interoperate well with FOSS software like K9 and Thunderbird.

Thank you for your comment. Since I deactivated Google Play services, I don't get notifications on many apps. I didn't know there were alternatives. Unfortunately, the app server must be compatible, but if I can have it at least for Telegram with this fork, it would be a good start. I'll take time to compare the different alternatives and see if other push servers are compatible with more apps.

For what I understand, there are self hosted push servers, like NextPush that works on Nextcloud, and some that provide you a server, liked ntfy. For the latter, you have to check the privacy policy to see if it's better than the default Google firebase server.

In some countries, you need an ID to buy a sim card, so it's linked to your identity, even if you pay cash.

I vote for political parties that are explicitly against facial recognition when possible (always a small party that nobody knows). I use cash.

Libretube works for me, but not Tubular.

He wants to try before accepting the deal.

I don't know if there exists such a thing as GrapheneOS account, but it is not required. You can add Google, Facebook or other accounts like with regular Android. I use a self hosted Nextcloud instance to synchronize contacts and calendar with DavX5 app. GrapheneOS has built-in apps. I use most of them. For the app stores I mostly use Fdroid and Aurora store for non open source software. I don't use Google play store even sandboxed because I don't accept the terms of use, mostly because they have the right to uninstall apps from your phone without consent or notice.

Like Windows, Ubuntu is installed by default on many computers. In my university, all the computers have a dual boot Ubuntu Windows.

Some like Phind or Perplexity cite their sources. And they give you directly the answer you're looking for without having to search it in a mess of "subscribe to our newsletter", "other articles that may interest you", 3 paragraphs of "if you read this article, you will know what you want to know", "special promotion for you",…

Glad to see you use cash. It's often forgotten in privacy advice, despite being one of the most importants.