Last month the upgraded Butterfly S got the last version of Jelly Bean and the shiny new Sense 5.5 UI, and it looks like HTC's software team has worked their way to the original Butterfly model. Noted HTC leaker @LlabTooFer posted the over-the-air update screen this morning, and at least one blog showed the same software update going out in Malaysia yesterday. According to a Twitter reply, the Taiwanese variant is being updated as well.

The Butterfly is a 5-inch 1080p phone similar to the One X and its sequels, originally released in Japan and later sold in regional variants around the world.

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