Yesterday, Three UK began to send out the Andorid 4.1 (Jelly Bean) update to Samsung Galaxy S3 phones, and now we have two more British carriers following closely -- Vodafone and O2. O2's rollout will begin today, it says, while Vodafone customers will have to wait until Monday.
Again, we're pleasantly surprised at how fast the British and European carriers have been able to get the updates to their devices and hope those on the American side are paying attention. Both updates will be a gradual rollout and are available via OTA over WiFi or via Kies.
If you have questions about a specific carrier's implementation, hit up the source links. We'd love to hear from you if you're on one of these carriers and update your Galaxy S3.