In "Eleanor Oliphant Is Completely Fine," the protagonist shares her experience with phone calls, notably how infrequently her phone rings. When it does ring, it surprises her, while most callers are salespeople pestering her about mis-sold Payment Protection Insurance. This highlights her isolation and the intrusion of unwanted communication in her life.
The light-hearted remark about whispering threats to callers before gently hanging up underscores Eleanor's quirky personality and her desire to reclaim control in situations that otherwise feel invasive. It offers insight into her loneliness while showing how she copes with it through humor.