Systems and methods are to provide information to facilitate online transactions via mobile communications. In one aspect, a system includes a data storage facility to store and associate personal information of a user with a telephone number of the user, and an interchange coupled with the data storage facility. The interchange includes a common format processor and a plurality of converters to interface with a plurality of different controllers of mobile communications. The converters are configured to communicate with the common format processor in a common format and to communicate with the controllers in different formats. The interchange uses the converters to communicate with the mobile phone of a user to approve the providing of the personal information from the data storage facility to a website.