ISP "A" might approve a version in May, while ISP "B" waits until June to ensure it doesn't break their specific VOIP or TV services.
. They can manually "push" a specific firmware profile to your MAC address if your device is out of sync. If you'd like, I can help you further if you tell me: Who is your Internet Service Provider Are you seeing a specific error light on the router? What is the current firmware version listed in your settings? Update Software in SAGEMCOM F-ST 3890 V3 Delta