Systems and methods for enabling sharing of call and/or messaging services between mobile devices via wireless connection, e.g. a Bluetooth connection. The systems and methods allow a first mobile user to register as a host user. A guest user sends a service sharing request, via the Bluetooth connection, to the host user's mobile device requesting permission to make calls and/or send messages using the host user's mobile account. When the host user accepts the service sharing request, the service sharing system inserts an identification code of the guest user in the call data record to help identify the actual call/message originating party. Once a transaction is established between the guest user's mobile device and the destination number, via the Bluetooth connection to the host user's mobile device, the service sharing system may monitor the transaction duration to ensure that it does not exceed the specified call duration or other limit.