Lost i phone an someone change apple i d

Apple doesn't get involved in lost or stolen devices. We are all users here and cannot help you.

Since you seem to know who took your phone, this is something you need to take your local police authority.

There is literally no way anyone here could possibly tell you that. And again, Apple won't get involved. Perhaps your cellular provider can tell you. But this is honestly a theft, which means you should take this to your local police. Surely since you know who has your phone, the police shouldn't have any issue getting it back for you.