Quickly start a service for a new asset on mobile.
Open a job and in the Asset section
Search for the asset
If no asset is found click on create new to create an asset with this ID (This might be called something else in your account, it can be customised in Settings - Misc)
This will create a new asset ready to start service
If you can't see the Start service button click Save at the bottom of your screen to save the asset then click start service