invisible, inaudible, or in the office

'Children should be seen and not heard'
So long as you don't irritate the grownups of the world you have a right to exist.
Cute your allowed to be, attention seeking, not.
An existence subject to terms.

Seems the little beasty is a different little beasty to different people, or maybe even is a different little beasty dependent on place.

When it's my own, it's a necessary piece of what not to leave home without: keys, wallet, cell phone. An object that extends me, I can travail time and distance to communicate with others.

When it's someone else's and its ringing in a lecture theatre, movie, restaurant its an unwelcome intruder.
Even when its my own and it does this at such times, its still an unwanted intruder. I now owe a packet of biscuits to the group I run for Youthline since the little beasty made its presence known tonight.
When contacted with demands of do this, do that, where are you... it's more like a leash than an object that extends my powers.

In an article by Chris Bigum, (1998). Schools in search of educational problems: Speaking for computers in schools. Educational policy, 12(5), 586-601.
Chris talks of how the computer within schools is experienced as being a very different animal by different people. I would argue that the same can be said of cell phones.
Hijazi-Omari, H., & Ribak, R. (2007) in 'Playing with fire: On the domestication of the mobile phone among Palestinian teenage girls in Israel' also talk of how the cellphone can be an emancipatory object or a leash. Their description focuses on the love interest experience of young women and girls. The cell phone assumes symbolic representation as a ring might have in another culture.
But with added risk and benefits. The title 'Playing with fire' isnt elaborated on, but one sumizes that the risk of having the cellphone found by brothers, fathers, others may be extreme. There is also the tethering of having the sim card read to ensure that the purpose of the gift was not extended. This included one example where the 'girl' was not informed of the number of 'her' cell phone so as to maintain an inscribed use.
The emancipatory quality appeared subsumed by the high level risk involved. But many of the issues are the same ones talked of by Carolyn Marvin (1988), in her book titled "When old technologies were new: Thinking about electric communication in the late nineteenth century."

New Zealand Broadcasting Authority release research on the 6th May indicating 42% of children 6-13 years use a cell phone.
I suspect they also use landlines but thats not news worthy.