If data is not syncing in your mobile app,you can check these things:
Step 1:Your BUSY should be the latest release.
Step 2:Your mobile app should be the latest release.
Step 3:Your internet should be properly working on your system.
Step 4:Check in,Administration,click configuration,click features and options,click GENERAL tab,Here you can check BDEP
idshould be configured.
Step 5:If its still showing issue, you can create a new BDEP id.
Step:6:Then you will have to upload data again it will be uploaded successfully.