I've been on both sides of that radio. I'm an ED RN and generally speaking, I don't care all that much about the format you use, as long as it allows you to present the patient in a coherent manner. What I'm primarily looking for is what your ETA is and your patient's chief complaint. After that, give me a 15-20 second summary what you've found, give me some vital signs (or a reason why you haven't gotten any), and then what you've done for the patient and perhaps your plan if you're still working on things.
Now if your system mandates a specific format for certain types of patients, learn that format and use it.
One small pet-peeve of mine is when the medic's radio is turned back to dispatch immediately after giving report and not really allowing me time to ask a clarifying question. Usually it's that I need something repeated, but when I ask and there's nothing there... it's kind of (slightly) irritating. If you're asking for orders, well then you'll be looking for those orders so you'll keep your radio on until you know that I've given them or not.
I have modified the below quote to reflect how I'd generally give a radio report.
Good afternoon, this is A100, inbound code 2 BLS,10 minutes out from your facility, with a 68 y/o female with suspected right hip fracture from a mechanical fall on same level. Right leg is shortened & externally rotated. Good distal CSM. No LOC, no head strike, no thinners. Patient is resting comfortably, vitals are - P 90, BP 130/90, SpO2 98%, BGL 100, temp 99 F. No significant interventions being provided. Any questions?
Where I'm at, most of the ambulances bringing patients to the ED are ALS, so when we say "ALS" instead of "BLS" we're basically saying that the patient needed some kind of ALS intervention or monitoring specifically. Our crews usually only run Code 3 for traumas that are circling the drain, someone on BiPAP or needing the BVM (or other unstable airway problem), a stroke alert, or a code that they need to transport.
If you learn to do good radio reports and even hand-off reports to the ED, the people receiving your patient might not realize you're "only" BLS. That comes from practice, experience, and (most importantly) doing a very good assessment.