Scenario A. First time a user initializes sync on a new device
When a user logs on to a new device or a second device for the first time, it is likely that there is a large number of articles being queued for download.

Scenario B. Day-to-day syncing behavior
Each time a user logs into the app, if they have added an article to the reading list from web or another device, it will also show a notification as the sync occurs.

Scenario C. Cellular service is interrupted
If cellular service is interrupted during syncing (eg. either user initiated or due to day-to-day syncing behavior) an alert will be shown [Zeplin: https://zpl.io/a30kgex] and syncing will resume when cellular service is available.

Scenario D. User initiated syncing/updating
Users can manually trigger reading list syncing by pulling down to refresh within a specific reading list. Additionally users can sync/update multiple reading lists by tapping on the 'Edit' button on the Reading Lists section and multi-selecting reading lists.