To be factually accurate:The latest firmware is v1.3.30. If you go to 'settings' and 'about' you can see your current version. Also, if you tap on the version number, you will be able to download and install the latest version.
Latest production release 1.2.50
Latest beta release 1.3.30
Access to the beta releases requires selecting this at the firmware screen and accepting terms and conditions that come with using betas