You are downloading the Otis eService XAP file v126.96.36.199 for Windows Phone. Otis eService is a free and useful Business app: Smart Phone. Smarter Service.Gain the flexibility and convenience of mobility with performance details of Otis eService.Informed. ... You can now download the offline XAP file to install & try it.
Download Locations for Otis eService 188.8.131.52 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Otis eService XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.