Sony is now rolling out the Android 5.1.1 Lollipop update to another of its devices, but this time it's not a member of the Xperia Z line of current and former flagships.
There's no word yet on when the same software release should reach the single-SIM iteration of the same model, but it's clearly due to happen soon.
In the meantime, if you own the T2 Ultra Dual, expect to see an update notification popping up any day now. 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 rollout 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.