(3) This section does not apply to a person who: 

 (a) Uses the mobile electronic device to communicate if the person: 


(A) Is summoning medical or other emergency help if no other person in the vehicle is capable of summoning help; or
(B) Is operating an ambulance or emergency vehicle while acting in the scope of the person’s employment; or 

(b) Is 18 years of age or older and is using a hands-free accessory.

If you are 18 years of age or older and using a hands-free accessory, Section 2 that says you are violating the law does not apply.

You can legally call for an ambulance if you are in a wreck and nobody else can call for one, be operating an ambulance,  or be over 18 using a hands free device whether permanently part of the vehicle or not.