Systems and methods are described to allow safe texting with speech-text conversion for vehicle drivers, with provisions to prevent a user from defeating or bypassing the speech-text conversion. Some embodiments include a special software application in a driver's phone while other embodiments require only software changes at a service provider. If the velocity of a phone exceeds a disable threshold, it is assumed that the user may be texting while driving. That the user is a driver is then determined by one or more of multiple methods including registration. Conventional texting is then disabled for their phone and a safe texting capability is enabled instead. Where persons in the same vehicle utilize different service providers, parameters such as for instance cell phone position, velocity, and direction of travel are time stamped and passed between service providers or alternately made available to other service providers via a central database.