Just wanted to point something out.

[OperationA7X]

/System/App/Mms.apk (The TF300t doesn't have a SIM card slot, but the TF300TG/TF300TL does, obvious, I know.) It's not installed on the system, but it's there. And when you attempt to install it, it does not install. So, was ASUS just getting lazy or what? Screenshot.

Sent from my ASUS Transformer Pad TF300T using Android Central Forums