Vodafone SIM is your Vodafone login and password, and it is the same with any other operator. And with the problems we are facing with PKI right now, it might a

Vodafone SIM is your Vodafone login and password, and it is the same with any other operator. And with the problems we are facing with PKI right now, it might as well be the most practical way to do it, since MITM on mobile network would have been a night mare. Then again, it probably isn't the most practical way, the technology is old and the encryption broken.