Silent link esims are quite good for getting your phone to work on any country or network. I have one, not for privacy but more for better phone coverage and it works pretty well. No ID and you pay in crypto - btc/monero etc. (https://silent.link/)
For me the main use is that I'm on o2 in the UK, but if in some dead spot with no signal I can flip the sim settings and connect via EE or whatever.
Not from the UK but in Germany we have the same issue where there is T-Mobile (best coverage), Vodafone (good coverage) and o2 (worst coverage) and there are simply some remote areas where anything but T-Mobile doesn’t have coverage.
And the easy answer is that T-Mobile, or rather the parent Telekom, is a terrible company best known for right now for getting the government to agree that they can cancel your existing internet contract to make switching easier when they want to catch you as a fiber customer but actually all they’re doing is sending a marketing company around Germany (Raider Marketing) to lie to your grandma to sign contracts for the Telekom or just cancel your existing internet contract because they think with a bit of pressure they can get you to sign up with them.
Alternatively, they are also known for the worst peering on existence because they have the crazy idea that they can charge tenfold what other ISPs take for peering because they are the Telekom…
In summary, the Telekom is such a terrible company that I’d rather not give them any money and if I needed T-Mobile coverage I’d rather get a foreign eSIM and rely on roaming than giving them a single cent.
I'm happy to give them (telekom) money because their service works. Vodafone was constantly inferior in my experiences (dsl vs cable as well as their mobile networks). At least i don't have to call vodafone every month like my neighbors do when the internet is down, worth every penny.
>For me the main use is that I'm on o2 in the UK, but if in some dead spot with no signal I can flip the sim settings and connect via EE or whatever.
Why not just get an EE SIM if that's your main use?