I have been investigating on this for a while now.
https://community.esri.com/message/593405?commentID=593405#comment-593405
https://community.esri.com/message/596846?commentID=596846#comment-596846
Trimble Juno 5D
and many more.. have been raising this issue of ArcGIS Mobile not projecting the GPS data into the Map coordinates (other than WGS84).
Can a custom extension be written to overwrite the default behaviour and introduce the transformation before the GPS data is shown on the map. Any pointers.
Environment background,
OS Windows 8.1, Panasonic Toughbook, ArcGIS Mobile 10.2.1 (latest)
More details here: GPS connectivity on ArcGIS Mobile 10.2.1