Cadence is frequency
Monthly and quarterly describe expected rhythm, not a guarantee that every model, region, and carrier receives an update together.
Schedules can change
Older models may move to a less frequent schedule while remaining supported. Use a published scope list, not assumptions.
Record the check date
Store the source, exact scope, and date checked. Manufacturers add, move, and remove models over time.
Primary sources
Important
Device support and safety information can change. Recheck the linked manufacturer and regulator evidence before making a purchase or safety decision.