Techniques for predicting accessory behavior and techniques for responding based on the predicted behavior are provided. A mobile computing device (MCD) determines firmware being used by an accessory. Based on the determination, the MCD can predict a command most likely to be received next from the accessory. After the MCD determines the command most likely to be received next from the accessory, the MCD can retrieve the information to be sent in response to the command and/or initiate an operation to be performed in response to the command prior to actually receiving the command from the accessory.