I don't believe mobile phones affect medical equipment. Well, maybe the super sensitive stuff like an EEG or something. But I have connected ECG electrodes directly to my mobile in the past and guess what happened to the trace.....Nothing!!
I believe you should be allowed to use mobile phones in the public areas of a hospital but not on the wards etc, and you should always take other people into account when using them, I know I do. Why would I want to broadcast my conversation anyway?
You must believe it will affect medical equipment though most kits are built to comply with IEC 60601-1-2 but remember to be immuned from such interference relies on 3 basic factors: the strength of the interference; the distance between the interference and the kit, and the transmitting frequency.
Cheers!
