Sorry if this was posted before.but I searched the forums and all I could find was emulators and other crap.
Now I am going to post a download link to the official Blizzard Authenticator mobile phone application
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And checked for viruses Virustotal. MD5: c0646aabd9231bfe7c0686a88f14034c
Note:the archive contains 2 folders one has the Authenticator in High Resolution and the other in Low Resolution choose the one that suits your mobile phone.
It only works on mobile phones that have Java.
What you need now is and USB cable and to install it on your phone,then you need to synchronize it(you need to allow the application to connect to the Internet,your mobile phone must be able to connect to the internet) and then add it to your Battle net account and get your Core Hound Pup and improved account security.
Sorry if this is a repost or if you find it useless.(in that caseI would ask a mod to delete it)
Thanks for reading.