This is the general section. POST QUESTIONS IN THE Q&A SECTION. Secondly, you should use the search button xda has or even use google to search for things before creating threads like this. But to answer your question, you can get the FTF here: http://xdaforums.com/showthread.php?t=2541008
Its for c1904 but c1904 and c1905 are the exact same so don't worry about it. It is a global firmware and will work in Hong kong.
This is the general section. POST QUESTIONS IN THE Q&A SECTION. Secondly, you should use the search button xda has or even use google to search for things before creating threads like this. But to answer your question, you can get the FTF here: http://xdaforums.com/showthread.php?t=2541008
Its for c1904 but c1904 and c1905 are the exact same so don't worry about it. It is a global firmware and will work in Hong kong.