I ran the Toshiba update utility.
The Android version if 4.0.3.05.000050722
It says that no software updates are available, so I assume this is the latest version of Android.
Ran some system info apps. Got this information:
BuildInfos Android version : 4.0.3 Release Codename : REL API LEVEL : 15 CPU ABI : armeabi-v7a Manufacturer : TOSHIBA Bootloader : unknown CPU ABI2 : armeabi Hardware : tostab11BA Radio : unknown Board : tostab11BA Brand : TOSHIBA Device : tostab11BA Display : IML74K.05.000050722 Fingerprint : TOSHIBA/tostab11BA/tostab11BA:4.0.3/IML74K/05.000050722:user/release-keys Host : dps3build5.local ID : IML74K Model : AT300 Product : tostab11BA Tags : release-keys Type : user User : android-toshiba