I have an LG Spectrum, running ICS, and I always keep the USB Connection Type on Charge Only. Lately, for some evil reason, whenever I connect the USB cable to a computer, it bloody ignores my setting and decides to do Media Sync (MTP) instead.
I've searched for (and will continue to search for) ways to prevent this, but I've not found much, and what I did find didn't apply to my situation. (E.g., I couldn't Stop MTP in Running Apps, because it wasn't there.)
I don't know the MTP is, but I want it off my phone completely. I don't want the blasted sync. Ever.