what is the difference between "all hidden numbers" and "all unknown numbers"

what is the difference between “all hidden numbers” and “all unknown numbers” in function of SMS and Call Filter. Examples needed. Thank you!

Hello,

unknown numbers are those not in your phone book.
hidden numbers refer to calls where the caller hides his number. so you see an incoming call but the number is supressed.

Interestingly, “Hidden numbers” block is also available for outcoming calls. Probably doesn’t make sense?

Hi,

no, it doesn’t, but since you can enable one group for multiple purposes (incoming/outgoing calls/sms), it would make things a lot more complicated if you couldn’t add “All hidden numbers” to a group if incoming calls are not chosen.

Filip