I just had to make this cartoon as well. Again to illustrate an important point to all the paranoid people out there. Please note that i made this with an enormous respect for the work conducted by Karsten Nohl , Chris Paget
(and probably many others as well). The work they've done on A5/1 is incredible (to me at least), and I'm still reading the even newer stuff on KASUMI (A5/3). I'll get back on both in later blog posts.
(Click the picture to see it full size).