Sony has updated its Xperia SP support pages to highlight that this new build includes an enhanced user experience, improved battery life and software performance improvements. You can see from our Xperia Update Checker screencaps below that the firmware is already out across a number of different regions for all three variants of Xperia SP (C5302, C5303 and C5306). If you’ve downloaded the update, let us know your impressions in the comments.
Sony’s changelog for Xperia SP update (12.1.A.1.201)
New Xperia SP firmware with build 12.1.A.1.201 is now rolling
Xperia Update Checker shows the 12.1.A.1.201 firmware has been released across a number of regions
Thanks nklive!