The XDA Developers site has posted a host of CID (Customer ID) numbers that are eligible for the download, which pertain to Worldwide English versions of the device, mainly sold in Europe.
The overdue update comes after HTC promised some juicy Jelly Bean for the music-themed handset, first in July and then in October.
XDA has posted links to the direct download from HTC's site.
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No US launch yet
The update comes following a roll out of Jelly Bean for the flagship HTC One X device last month
There's no indication of when Statesiders might receive the HTC One S update, but this European roll-out is surely a good sign.
Via Android Police