When your phone shows up as a USB mass storage device, then using the Instrument Control Toolbox will not be of any benefit.
To access your phone from MATLAB, connect the phone before you start MATLAB, use your operating system to map the disk to a drive letter if you need to, and then start MATLAB. Within MATLAB, use the drive as a regular file system, to read and write files.
All that you will be able to do in that situation is add data to the phone, or extract or delete data from the phone. You will not be able to make calls with the phone, and you will not be able to control the phone or run applications on the phone.
Some manufacturers provide software which allows more to be done with their phones. Without special software provided by the manufacturer, all that can be done is to look at files. For example, most phones will allow you to access pictures taken with the phone camera.
Phones that have a blue-tooth connection can sometimes be used for additional purposes, such as using the phone as a modem.
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