content: Interesting, I'm not very clued up on these things, learnt the hard way.. Mobishield seems to propose encryption to any number. They provide you with a seperate number to the sim and claim it's completely encrypted, is that a false claim? I can see why it would be unencrypted at the recipients end but as long as it's encrypted when sent to the telephone mast that's all I need to stop a local mitm intercepting the signal as far as I understand it.