Call blocking is one of the quickest ways to reduce repeat nuisance calls. It will not stop every scam campaign, because many callers switch numbers frequently, but it does give you control over persistent offenders and buys you a little more peace.
Blocking on iPhone
Open the Phone app, go to Recents, tap the information icon next to the number, then choose Block this Caller. You can also review blocked contacts in Settings under Phone. If nuisance calls are constant, the Silence Unknown Callers feature is worth considering, although it may also send genuine unsaved callers straight to voicemail.
Blocking on Android
Android steps vary slightly by device maker, but the usual route is the same: open the Phone app, find the recent call, long-press or open the number details, and choose the block or report option. Some Android phones also include spam detection and caller screening tools built into the dialler.
Blocking on landlines
Landline users often have fewer built-in controls, but there are still good options. Some providers offer call protect features, anonymous call rejection, or nuisance call filtering. Many modern handsets also support a local block list. If calls are frequent, a dedicated call-blocking device can be worth the effort.
Know the limits
Blocking helps with known repeat numbers. It does not stop number spoofing, large scam operations using rotating caller IDs, or withheld calls unless your provider offers tools for those too. Think of blocking as one layer of protection, not the entire solution.
The best results usually come from combining blocking with voicemail screening, TPS registration, number lookups, and a firm habit of verifying organisations independently.