DAR, I am much honoured by your consent and support, thanks indeed. Still, allow me to suggest we should be even more rigourous than your usual gentle self: keeping the phone in one's pocket is not enough. Not even mentioning how close it could be to certain delicate parts of the human body (depending on the body and the clothing, and the detail position of the pockets therein), and what effect it could have upon them when suddenly unexpectedly buzzing and vibrating

- it simply shouldn't be aboard, unless switched off but then really off, until the PPL has been achieved. The whole PPL syllabus and exam scheme was conceived and implemented long before these contraptions came around. Potential distractions are to be avoided, unconditionally.