Learning how to block spam calls is the fastest way to take back your phone. This guide covers iPhone and Android in the UK, with the built-in tools first and reporting steps at the end. One honest note before we start: no method in this guide will block every spam call. Spammers change numbers all the time, so the goal is to cut the calls down to a few a month, not to zero, and to make sure a real caller can still reach you.
Start with the simplest rule. If you do not recognise a number, do not answer it. Let it go to voicemail, because a genuine caller will leave a message and a spam caller usually will not. Then block the number from your recent calls list. That takes ten seconds, and it is the habit that makes the rest of this guide work.
How to block a number on iPhone
The fastest way to learn how to block a number on iphone is the Recents list. Open the Phone app and tap Recents. Find the number you want to block and tap the small info icon next to it. Scroll down to the bottom of the screen and tap Block this Caller, then tap Block Contact to confirm. From that moment the number cannot call you, send you a text, or reach you on FaceTime. The caller will hear the call go straight to voicemail or fail, and you will not see the call at all.
You can also block a number from a text message. Open the message, tap the number or contact name at the top, tap Info, then tap Block this Caller. If the same person calls from a different number, block that number too. To see your full blocked list, open Settings, then Phone, then Blocked Contacts. From there you can unblock a number if you blocked it by mistake, which is worth checking once in a while.
How to block mobile number on iPhone
Many people search how to block mobile number on iphone when the call came from a mobile number rather than a landline, and the steps are the same. Open Recents, tap the info icon, and choose Block this Caller. The difference with mobile numbers is that they are easier for spammers to change, so you may need to repeat the step for each new number. That is normal, and it is still worth doing, because each blocked number is one less call you will get from it.
If you want to know how do i block a phone number iphone in the fastest way possible, use the Recents list right after the call, while the number is still at the top. Many people search how do i block a phone number iphone when they are looking for the quickest path, and this is it: Recents, info icon, Block this Caller, confirm. It takes less than ten seconds, and you can do it before the next call arrives.
How can I block a number on an iPhone from Messages or Contacts
Sometimes the spam arrives as a text rather than a call. To answer how can i block a number on an iphone from a message, open the message, tap the number at the top, tap Info, then tap Block this Caller. You can also block someone from your Contacts list: open Contacts, tap the contact, scroll down and tap Block this Caller. This is useful when a number you saved years ago starts sending spam, or when you want to block a business that keeps calling after you asked them to stop.
Block a number with iPhone: Silence Unknown Callers
Blocking one number at a time works, but it does not stop new numbers. To block a number with iPhone more widely, turn on Silence Unknown Callers. Open Settings, then Phone, then Silence Unknown Callers, and turn it on. After that, calls from numbers that are not in your contacts go straight to voicemail and do not ring. Your phone still shows them in Recents, so you can call back if the call was genuine. This is the single most effective setting on iPhone against spam, and it works best together with blocking individual numbers.
How to block a number on Android
On Android, the steps to learn how to block a number are just as simple. Open the Phone app and tap Recents. Tap the number you want to block, then tap Block, and tick Report spam if the option appears. Reporting helps your carrier and Google mark the number as spam for other people too. You can also block a number from the Messages app: open the message, tap the three dots, then Block. On Samsung phones the menu looks slightly different, but the Recents list always has a Block option, and the blocked list lives in Phone settings under Blocked numbers.
Android phones also have a built in spam filter in the Google Phone app. Open the Phone app, tap the three dots, then Settings, then Caller ID and spam, and turn on Filter spam calls. The phone will send suspected spam straight to voicemail without ringing. Pixel phones go further with Call Screen, which asks unknown callers to say who they are before the phone rings. Turn it on in Phone settings if your Pixel offers it, because it stops most recorded spam messages at the door.
Use carrier tools and report spam in the UK
Your carrier can help too. In the UK you can report a spam text by forwarding it to 7726, which spells SPAM on a phone keypad. Your carrier uses these reports to block the number for other customers. You can also register your number with the Telephone Preference Service, or TPS, which stops most legal marketing calls within 28 days. It will not stop criminals, but it cuts the legal calls right down, so the calls that remain are easier to spot. Ofcom, the UK regulator, also takes reports of nuisance calls on its website, and your carrier can tell you about its own spam filter if you call them.
If a caller claims to be your bank, a delivery company or a government office, hang up and call the real number from the official website. Real banks never ask for your full password or a one time code over the phone. If you already shared details with a caller you now suspect, call your bank at once and change the passwords for the accounts involved.
Blocking spam calls is a habit, not a one time fix. Block each new number, keep Silence Unknown Callers or the Android spam filter on, and report the worst numbers to 7726.