I haven't worked on iSIM myself, but I have colleagues that work on integrating iSIM onto an SoC. The procedure around integrating an iSIM into an SoC is ridic

I haven't worked on iSIM myself, but I have colleagues that work on integrating iSIM onto an SoC. The procedure around integrating an iSIM into an SoC is ridiculously strict. The integration and simulation has to happen on a workstation in a special room, not connected to the rest of the network, with camera surveillance, etc. > We're also supposed to trust Qualcomm that this is secure I don't know if Qualcomm can do things differently. I don't know if they can design the iSIM themselves instead of integrating from a trusted third party. But I doubt that the security requirement is any less strict. Telecom operators seem to be extremely paranoid about this stuff. Essentially, it seems like it's not that much different from eSIM, you're just putting a similar kind of trusted module on the SoC instead of on the PCB. > together with it's anti-tampering design I'd be very surprised if iSIM and the whole Qualcomm SoC isn't designed with anti-tampering mechanisms. Seems like anti-tampering is becoming a general requirement for SoCs (with upgradable firmware and root-of-trust) being designed now.