All the carts on that seat are percussion fired, a mobile phone would make no difference in this particular case.
Rigga, I have no issue with componants and equipment which are extended due to testing etc. My issue is 'footfall' in and out of the seat which has the potential for damage to the componants on the seat which increases over extended periods. For example the amount of dirt from the underside of boots/shoes that collects in the seatpan can be considerable even after just six months. Also the longer the seat is in the longer it is subject to weather, the canopy does not always get closed before the rain arrives!
The extention to seat servicing and centralised servicing was to save money, lets not kid ourselves it was anything else.