Here’s a review of the "unblocked call" as an experience, a tool, and a cultural artifact.
Calling your parents or a close friend who has you saved in their contacts. Worst use case: A cold call from a salesperson. You will be screened, sent to voicemail, and googled afterward. unblocked call
Alternatively, this is expressed using the network's blocking probability: Here’s a review of the "unblocked call" as