Sony Xperia Z1s from T-Mobile gets OTA to Android 5.0.2
The OTA is available for the T-Mobile Xperia Z1s C6916 and it brings it to version number 14.5.B.0.236. It is based on Android 5.0.2. The update is available via the system menu and you can also find a mirror on the Xperia Blog just in case you want to update manually.
Source: Xperia Blog