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9:15 : Think this is all a bit bizarre so phone colleague on mobile, she answers to say that she’s having lots of problems too.

Yes but A5/1 is utterly brocken. Besides thanks to numerous attacks possible through SS7 you probably do not even need to break the encryption.

No attack is necessary, operators has taps for listening in. See "lawful interception".

If use of encryption were banned, I wouldn't even be able to unlock my Android.