Systems and methods are provided to facilitate online transactions via mobile communications. In one aspect, a system includes a plurality of converters to interface with a plurality of controllers in different formats for delivery of premium messages; and a common format processor coupled with the plurality of converters in a common format to send the premium messages. In one embodiment, the common format processor is to obtain an authorization for the initiation of communications with a mobile phone of a user for subsequent payments to a merchant. After obtaining the authorization, the common format processor may directly initiate communications with the mobile phone, using one of the converters, to obtain confirmation of payments directly requested by the merchant. Upon confirmation with the mobile phone, the common format processor may send premium messages to the mobile phone to collect funds for making the confirmed payments.