No one answered? Cheese and rice! I can give you some help.
Well - to fight it you need to demand a trial.
The officer will testify at the trial.
You must expect him/her to say "I saw defendant using a cell phone while driving without a hands free device."

Then, you have to ask questions like:
"Do you have any phone records to prove I was using the phone?"
"Do you have any video or images of me using the phone while driving?"
"Did you contact any witness who gave you info that I was using the phone while driving?"
"From your view point, could you tell that I was watching a movie?"
"Could you tell that I was reading a Podcast?"
"Could you tell that I was viewing pornography?"
"Do you know who I was texting?"
"was I getting directions?"
"Was I dialing?"
"How long did you see me using the phone?"

Then, you start your argument:

"Your honor, I am presumed innocent. I was making a good faith effort to obey the law. I was at the time fully in compliance with the law. I believed I was in compliance with the law. The officer does not have a witness to say I was using the phone. He has no phone records. He is basing this violation on 3 seconds of observation of a moving vehicle. I am innocent. I am presumed innocent. I was obeying the law. I ask the court to find that the government has not met its burden to prove up the charge in this case. On these facts. On this lack of evidence. I ask that the court rule not guilty."

Odds of winning? 1 in ...........do you have any tatoos on your neck? . .. . 1 in.......30.AttyDort41081.2439422454