Hello everyone,
I need your help. I bought a Pixel (new), setted it up with Grapheneos. I did not connect it to any other device. (Only at Installation)

Some month later, i wanted to use facebook. I registered an account by browser. A code was sent to my email address. I entered the code and i was blocked because of violating their conditions.

I thought okay... Tried again later. Blocked not even got a code. Okay,... So i tried other browsers (different fingerprint), blocked webrtc, changed IP 4 and 6, Trier vpn, other mail adresses. And tried other Graphene user profil. Yes deleted cookies etc. Nothing helps, i stay blocked because oft violating the rules. I was not having a facebook account for more than 6 years, but their system knows it better...

So my question is, how can that webpage know that it is the same device. I mean imei and mac should not be seen by facebook + my phone is new, i do not have money and interest in buying a new phone for no real reason...

Kind regards

Did you update Facebook via aurora or fdroid? Maybe that's the reason

All browsers have been installed with aurora. I used the anonymous login. I did not use facebook app and there are no google services running on my device.
Additional by registering the accounts with my real name i tried in the end fantasy names and different passwords, too. But i got blocked...

You're doing something that their spam filter is picking up on. I don't see how it could have something to do with the device.

But how. The method is: First tab E-Mail address - Second tab facebook registration. At first time they sended a code. Then i switched to tab 1, copied the code, entered it and got blocked.
At 2nd time and following: Opened mail address in tab 1, registered at facebook at tab 2. In that cases they did not send any code. They ask for phone or mail adress again. I can enter the same again or enter a different one. To this address a code is sended. If I enter that code in facebook i am instantly blocked. Most time IP was not covered behind VPN and i am using trusted provider. I did not do any spamming. I only want to connect with girlfriend and friends.

    MrSmartphone What's the email provider? Something like AnonDaddy and SimpleLogin? If so, that could be the cause of your issue.

    Tried outlook and protonmail

    Use a phone number to register. If you don't have any, you can try onlinesim. They accept cryptocurrency. Obviously you should remove/change it/add an email to your account after registering because it's a temporary number.

    It's totally normal that accounts registered with an email will get banned or prompted for identity verification