Wow if there was no cell service, you would have been a hero!Don't you hate it when that happens?
I used a ham radio repeater with a phone patch to call in a jeep rollover once. While I was on the patch with 911/dispatch, another motorist with a cell phone stopped and called it in, too. Buzz kill.
It's great to know that you are prepared. I hope you are around me, if I ever need such assistance.