A new Android 5.0.2 Lollipop 14.5.B.0.228 firmware has been certified for T-Mobile Xperia Z1s C6916 handset at PTCRB over older 14.5.B.0.220 firmware which was certified in April starting. A few days back Sony rolled Android 5.0.2 14.5.A.0.242 firmware update on global variant of Xperia Z1.
14.5.B.0.228 firmware will move Xperia Z1s to Android 5.0.2 from Android 4.4.4 KitKat 14.4.B.0.56 firmware. No ETA is there when the update will be rolled on the carrier handset in USA.
Xperia Z1s 14.5.B.0.228 Lollipop firmware
Check out the 14.5.B.0.228 firmware certification for Xperia Z1s C6916 on PTCRB.
Sony earlier pulled Android Lollipop update from some regions within a day of rolling it on Xperia Z3 and Xperia Z2 (because of some bugs) and then released another bug fixing update; 14.5.B.0.228 firmware seems to do the same thing over 14.5.B.0.220 firmware (which was never released).
Sony will also give Lollipop update to Xperia T2 Ultra and Xperia C3, 19.3.A.0.468 firmware has been certified for both handsets already.
Once 14.5.B.0.228 Lollipop firmware begins to roll, we will let you know.
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