1. SAP Help Portal
SAP Field Service Management Mobile for iOS and Android: In the section "Working with Activities"
the documentation states
"When you are ready to begin working on an activity
you can update its status by selecting a workflow step." This confirms that workflow steps are the primary mechanism for status updates. (SAP Help Portal
SAP Field Service Management
"Working with Activities" section).
2. SAP Learning Hub
Course FSM100 - SAP Field Service Management: Unit 5
"Mobile Application
" details the technician's user experience. It explicitly covers how technicians progress through a service call by selecting sequential workflow steps on their mobile device
which updates the activity status accordingly. (SAP Learning Hub
FSM100
Unit 5
Lesson: Mobile Application Workflow).