All cell phone now
I work EMS here in the Seattle-Everett-Tacoma area. EMS crews will often use the cell phone to talk to ER's since we can talk a little more freely than we can on an open VHF or UHF frequency. However whenever I can I prefer to use the HEAR since it is faster and easier. With that said...
I am a nurse working for one of the Seattle area ambulance companies doing Critical Care Transport. It's not AMR so that might narrow it down a bit. We only use Nextel for all comms now. We are dispatched by it and we talk to all hospital ER's on it. It's not a good system but it's cheap and I can't get the administration to understand that having a public safety organization (private or public) rely on civilian commercial "cell phone" technology is a really bad idea. We have no back up at all and although our rigs have VHF radios mounted our dispatch center does not have the ability to use our company frequency. It seems we lost our lease for the base antenna and they decided to just use the Nextel instead of getting a new one. We have had times when the Nextel system has gone down. Our operation comes to a stop at that point, unless we choose to use our personal cell phones to contact dispatch.
The WAC (246-976-310) says: (note item 2)
Ground ambulance and aid vehicles — Communications equipment.
(1) Licensed services must provide each licensed ambulance and aid vehicle with communication equipment which:
(a) Is consistent with state and regional plans;
(b) Is in good working order;
(c) Allows direct two-way communication between the vehicle and its dispatch control point;
(d) Allows communication with medical control.
(2) If cellular telephones are used, there must also be another method of radio contact with dispatch and medical control for use when cellular service is unavailable.
(3) Licensed services must provide each licensed ambulance with communication equipment which:
(a) Allows direct two-way communication with all hospitals in the service area of the vehicle, from both the driver's and patient's compartment;
(b) Incorporates appropriate encoding and selective signaling devices; and
(c) When transporting patients, allows communications with medical control and designated EMS/TC receiving facilities.