“The following chart outlines all state-level cell phone and text messaging laws. Some local jurisdictions may have additional regulations. Enforcement type is shown in parenthesis.”–From the website. The chart is from the Governors Highway Safety Association.
The Insurance Institute for Highway Safety offers its summaries of state driving laws, including cell phone laws, child restraint/belt laws, dui laws, speed limit laws, and others. The site is updated continuously by the Institute as states enact or amend their laws. You can search to see a chart that allows you to compare laws among the states, or you can search to see only the laws of a specific state.