...
Before doing a mobile "sync" to push data back open (in new tab/browser):http://localhost:8080/servoy-webclient/solutions/solution/servoy_sample_crm?nodebug=true
When now doing a "sync" on mobile any new contact or edit should show in sample crm,
also opening multiple mobile clients in different browsers will show changes after sync.
Note:
In somesituations is happens that the new war at point 2 is not seen by tomcat webserver, in that case delete the .war and direcory servoy_sample_mobile in <servoy7.0install>/application_server/server/webapps.