It has taken weeks after everyone else but the Samsung Focus version 1.4 finally has started receiving the Mango update. The v1.4 Focus has always been a little behind everything else when it came to updates because Samsung made minor changes to a certificate in the device (this according to Paul Thurrott on the latest Windows Weekly Podcast).
Users are now reporting that their 1.4 Focus’ are being prompted with available updates so if you have one, check your device or connect it to your PC and check for updates in Zune. If you are unsure which version of the Focus you have, pop out the battery and look on the sticker in the battery compartment. There you will see a “Revision” number.
Here is the link to the Windows Phone Blog announcing the update