Today, the newest version of Sony Xperia T2 Ultra Dual (the dual-SIM version of Xperia T2 Ultra) now runs on the latest Android operating system.
There is no update on when the same software release will be available on the single-SIM iteration of the same model, but it might come up pretty soon.
So, if you own a T2 Ultra Dual, expect an update notification popping up at any time. After you’ve gone through the necessary steps and installed the new bits, you’ll be on build number 19.4.A.0.182.
Android 5.1 is mainly a bug-fixing release, and with this step Sony is thankfully also patching the much-discussed Stagefright vulnerability, so it won’t affect the Xperia T2 Ultra Dual after the update is up and running.