Domain-wide Overrides can be added there regardless of phone model. Always remember to save and reboot a device after applying overrides. 

Edit the Domain-Wide Default Device Overrides 

1. Log into SONAR as a reseller; you must edit the Domain Settings. 
2. Search for the Domain and click Edit (Pencil icon).
3. Click the Defaults sub-tab. 
4. Scroll to Down to Device Defaults and add or adjust Domain-wide Overrides within the text box.