The Sony Xperia X (F5121) and Xperia X Dual (F5122) models have both appeared on the PTCRB website, highlighting that the handset is on track to launch next month. Build number 34.0.A.1.205 is the first firmware version to be certified for the handset, but we can’t say for sure whether this will be the launch firmware. We will keep you posted as the phone nears its launch.
Xperia X (F5121) build number 34.0.A.1.205 certified on PTCRB
Xperia X Dual (F5122) build number 34.0.A.1.205 certified on PTCRB
Via iLog.
![New firmware released for Xperia U [6.1.1.B.1.100]](https://www.xperiablog.net/wp-content/themes/thesis_189_new/lib/scripts/thumb.php?src=http://www.xperiablog.net/wp-content/uploads/2016/04/Sony-SBH80-Bluetooth-Headset-Review_9.jpg&h=142&w=142&q=75&zc=1 "New firmware released for Xperia U [6.1.1.B.1.100]")