perhaps other also bought a Chinese Xperia t2 Ultra Dual (Model XM50H). I bought mine last week in Beijing (2480 CNY with an additional 16GB MicroSD card) . It was a branded China Unicom Model.
That model comes with Software for Baidu but not with any Google Software. Language can be switched - but some dialogs still remain in Chinese - not really a problem but the main problem was it was not possible to install the Google Playstore. Installing the apk works - but the playstore does not open (perhaps other Google Software will be needed ...)
My solution was to go a different way - I unlocked the bootloader via Sony - installed the Clockworks Recovery and then tried first to install the Ultimate Rom V2 but got a boot loop I searched around the net and found the #GeekPakistan Website. They had an blog entry how to update the T2 ...
BTW - the Sony PC Companion showed my XM50h as D5322 and so I changed my plan and decided to flash the Australian stock rom ...
That worked like a charm and now I have a unbranded T2 Ultra Dual with all the Google stuff.
unfortunately I am not able to post external links here (not enough postes yet - so just search for Download 19.0.D.0.253 Android 4.3 Firmware ftf for Sony Xperia T2 Ultra on Google and you will find #GeekPakistans website - he has the links to flashtool an the australian rom in his post
Install Flashtool, put the T2 Firmware file into the firmware folder under the flashtool folder.
Start Flashtool64 as administrator on (Windows 7/8/8.1 x64 version)
Connect to phone in flash mode
connect your phone
power it on and hold down volume down key
select T2 firmware
wait ... the flasher Software prepares the firmware and after a while it start to flash the phone
After a while you should get a flash successful message
Disconnect the phone and power it on
China Unicom Branding is gone - phone starts with Sony and Xperia Logo
Wizard starts after a while with setting up a Google account ...
Remark: that all worked for me - no guarantee that it will work on others ...
Update: 2015-08-28: When you lock the bootloader again - you will receive the normal OTA Updates from Sony again ... so my phone is now on 5.0.2 Build 19.3.A.0.472 and I'm waiting for the update to 5.1.1. or 6 ...