To date I have seen little of this technology on our aircraft. Probably due to the fact it is still relatively new and expensive in Australia.
I work for an international leisure carrier as opposed to a domestic airline, where they would be more likely to encounter these types of phones, given their high carriage of business passengers, so I have yet to encounter this one.
To ensure I'm not making assumptions based on ignorance I would speak to tech crew and management to ensure we have confirmation in writing that they are allowed to be used on the aircraft.
Reason being: Consistency.
Nothing worse than being told to shut something off when you have been given the ok the day before, on the same carrier, to use it.
And we all know there is always the odd nazi out there that isn't interested in your explanation.
Can't see outside the square- It's a mobile phone you have to switch it off!