Yes and it's not even malicious basebands, it's any at all. If you want to participate in the cell network in any way, even if you write your own baseband, the

Yes and it's not even malicious basebands, it's any at all. If you want to participate in the cell network in any way, even if you write your own baseband, the network will still be able to report your approximate position using UTDOA, CGI or CGI-TA, ECID, etc. The network needs to gather at least your id/plan ($) and CGI (which antenna and what power) as part of its normal process to give you service.