Although the Nokia Lumia series mobile phone also belongs to the Windows Phone, but it is different from the other WP smartphones, namely,聽 the Nokia Lumia has some their exclusive softwares.However, even if it is exclusive,聽 Recently, it was reported XDA had聽 installed successfully the聽 exclusive software of Nokia Lumia on AT&T聽 HTC Titan, if you are the users of HTC Titan, you can try this on your device. As for how to do it, please follow the steps below. AT&T Cell Phone Problems and Solutions
Firstly,聽 you have to install a ROM software, the ROM software is named WPV 8779 Nokia Edition V3, its size is 384MB .
Note. In the process of installation you must ensure that the ROM is a completely unlocked version.
In addition, during the installation of this ROM, you need to change the registration information of your mobile phone , including OEM and the name of your handset .Because if you do not change it,聽 the system will display error in the end.