The Android 5.1.1 Lollipop firmware update for the Xperia C3 and Xperia T2 Ultra has been certified by the PTCRB. Build number 19.4.A.0.180 has been certified for all variants of both handsets, including the dual-SIM versions. This compares to current build number 19.3.A.0.472. We will keep you posted once the Android 5.1 update is released.
Build number 19.4.A.0.180 certified for the Xperia C3 (D2533)
Build number 19.4.A.0.180 certified for the Xperia T2 Ultra (D5303, D5306, D5316) and Xperia T2 Ultra Dual (D5322)
Thanks difwwh and Gaurav!