The usual way is to install Samsung's Kies software (available from the Samsung website) on a PC, connect your phone with the USB cable, and use the "Check for updates" function in Kies to download and install available updates.
I hope this helps. If you require further help with this or any other aspect of your phone, please consider registering as a member and joining the friendly community in the Galaxy S2 (International) forum.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.