Downloaded .apk file for Android (searched web to find it because Play Store doesn't allow it for U.S. yet). Honked my horn remotely
. Takes a while to update location. It has room for improvement but might help in some situation. Won't work well if both phone and car don't have good (3G/4G) internet access.
Hint 1: After downloading .apk file, e-mail it to youself (e.g. GMail account). Then there is a function to "install" right from e-mail.
Hint 2: Use login user/pw for My BMW Assist account (all CAPS for both!). Then assign a 4 digit pin for the app (need to enter each time you launch).
I downloaded the .apk file from another board thread:
which contained this link to the .apk file:
2013 x35i (Space Gray, MSport, CW/CWII, DHP, Premium, Premium Sound, Technology, BMW-Apps)
Retired: '09 C300 4Matic, '09 GTI, '06 750i, '05 C55, '04 R32, '03 M5, '02 GTI, '01 M5, '00 M-Coupe, '00 540i/6, '99 M3 Coupe, '98 M3 Coupe, '96 328i,... '86 4000 CS Quattro... too many to list.