Apple has explored the ability to transfer a file from one cell phone to another during a connected call, according to a new patent filing revealed this week.

Similar to an application revealed in June, the new filing includes descriptions for sending text messages, e-mails, contacts, documents and more to a caller while two phones have established a voice connection. Entitled “Auto Messaging to Currently Connected Caller,” the 16-page patent application was filed for in February of 2008.

“While a user of a mobile device is using telephony services, the user may want to send a message or a file to another part,” the patent reads. “To send this information, the user may have to disconnect the call, and then perform a lookup of the caller’s contact information prior to being able to send the message or file. This multi-step process can be tedious for the user.”

Apple’s possible solution would offer a user interface that would provide users voice and message capability access while on a call. The system would automatically detect caller details and relay the information in the appropriate direction. The document even describes a scenario with a conference call and multiple listeners, where files could be sent to any or all included on the call. The invention is credited to Peter Henry Mahowald.

It states that data could possibly be sent over a variety of network options, including GSM, GPRS, Edge, Wi-Fi, WiMax and Bluetooth. The application also describes how the receiving party’s hardware might respond to the file, such as asking the user if they would like a contact to be automatically added to their address book.