Cut spam calls on your iPhone step by step while keeping calls from numbers you have saved. Unsaved numbers can be silenced.
Who it is for
iPhone users who get spam calls every day and worry that silencing unknown callers will hide real ones. Other phones have similar settings, which the FTC points you to. Do not paste contacts or private numbers into a chatbot.
Tools
An iPhone with the Phone app settings Apple describes
ChatGPT or Claude (free tier is fine), to plan the order of steps
Ten minutes to make a list of people and places that must always reach you
Steps
Write a list of who you need to reach: family, school, doctor's office. Add those numbers to Contacts. Apple says that for numbers in Contacts, you always see these calls. Unsaved numbers, such as a delivery driver, count as unknown callers.
Turn on the spam filter: Settings, Apps, Phone, then Call Filtering. Apple says spam callers are silenced and listed under Spam.
Turn on Unknown Callers filtering in the same place. Apple says missed calls and voicemails from unknown numbers move to an Unknown Callers list. This is a list filter, separate from screening and silencing. Look at the list each week and save any number that is real.
Try Screen Unknown Callers, Ask Reason for Calling. Apple says the caller is asked why they are calling before your phone rings. Apple also says screening is not applied while roaming, and before iOS 17 Live Voicemail has to be on. Use it for a week.
Only if spam is still heavy, set Screen Unknown Callers to Silence. Apple says calls from unsaved numbers are silenced and sent to voicemail, so check voicemail and the Recents list daily at first. Report scam calls at DoNotCall.gov, or at ReportFraud.ftc.gov if you lost money, as the FTC suggests.
The prompt
Help me cut spam calls on my iPhone without missing real calls. Plan the steps in this order: 1) save must-reach numbers in Contacts, 2) spam filter, 3) filter unknown callers into a list, 4) Ask Reason for Calling, 5) Silence last.
My situation: [how many spam calls a day, and which real calls come from numbers I have not saved, such as doctor, school, delivery]
1. List the types of numbers I should save in Contacts before I change any setting. Do not ask me for the numbers themselves.
2. Give me a one-week check-in list for each rung: what to look at, and what would tell me to move up or stay.
3. Tell me which rung to start on given my situation, and what I might miss at each rung.
Use short steps. Show me the plan first. Do not change anything for me. I make each change in Settings myself.
Tips
Apple says call screening is off for 24 hours after you call emergency services.
Apple says phone calls are not screened while you are roaming.
The FTC says scammers ignore the National Do Not Call Registry, so blocking and labeling is the better defense.
Menu names follow Apple's page dated September 14, 2026 (Settings, Apps, Phone). The page does not list supported iPhone models or regions, so check your own Settings.
Sources
Apple Support: https://support.apple.com/en-us/111106
Federal Trade Commission: https://consumer.ftc.gov/articles/how-block-unwanted-calls