The sim cards cannot be used as a secure element or a TPM in most android phones. The SWI lines that connects the SIM to Android are cut in most hardware desig

The sim cards cannot be used as a secure element or a TPM in most android phones. The SWI lines that connects the SIM to Android are cut in most hardware designs. Google cuts them in the nexus (with one nexus having a notable exception), Samsung cut them and forces you to use their embedded secure element.