What blocking does and where you can do it
Blocking stops a specific person from contacting you, seeing your posts, or reaching your accounts. The exact effect depends on where you block them — on your phone, email, social media platform, or messaging app — because each one works differently and blocks only that service.
On your phone, blocking prevents calls and text messages from that number. On social media like Facebook or Instagram, a blocked person cannot find your profile, see your posts, or send you messages. On email, blocked addresses go straight to spam. On messaging apps like WhatsApp or iMessage, the blocked person cannot send you messages or see when you are online.
Blocking is not the same as muting or unfriending. When you mute someone on social media, you still follow them but their posts stop appearing in your feed — they can still see your public posts. When you unfriend someone, they can no longer see your profile, but they can still message you or send a friend request. Blocking is the strongest option and prevents nearly all contact.
Key Takeaways
- Blocking stops someone from calling, texting, emailing, or messaging you depending on where you block them, but the method differs for each platform.
- On most phones, you open the contact, tap the menu, and select block or report — the exact steps vary by iPhone or Android.
- On social media, blocking is usually found in the person's profile under a menu labeled "..." or "More" — the blocked person cannot see your profile or message you.
- Blocking someone does not delete past messages or calls, and they may realize they are blocked if they try to contact you and see an error.
- If you block someone by mistake or change your mind, you can unblock them through the same menu where you blocked them.
How to block someone on iPhone
On iPhone, open the Phone app and find the contact you want to block. Tap the "i" icon next to their name, scroll down, and tap "Block this Caller." The person can still call or text you, but you will not see the call or message — it goes to voicemail or is silently delivered.
To block someone in Messages, open the conversation, tap the contact name at the top, tap the "i" icon, scroll down, and tap "Block this Caller." You can also block someone in Contacts by opening their card, tapping the "i" icon, and selecting "Block this Caller."
If you want to block someone on FaceTime, open the FaceTime app, find the person in your recent calls or contacts, swipe left on their name, and tap the trash icon, then tap "Block this Caller." To unblock anyone on iPhone, go to Settings > Phone > Blocked Contacts (or Settings > Messages > Blocked Contacts for text), find the person, and tap "Unblock."
How to block someone on Android
On Android, the steps depend on which phone manufacturer you use, but the general process is similar. Open the Phone app, find the contact, tap and hold their name, and look for a "Block" or "Block number" option. On Samsung phones, tap the three dots menu and select "Block number." On Google Pixel phones, tap the three dots and choose "Block."
To block someone in Messages on Android, open the conversation, tap the three dots at the top right, and select "Block." Some Android phones also let you block a number by opening Settings > Apps > Messages > Blocked numbers and adding the number manually.
To unblock someone on Android, open the Phone app, tap the three dots, go to "Settings" or "Blocked numbers," find the person, and tap "Unblock." The exact path varies by phone model, so if you cannot find it, search your phone's Settings for "blocked" to locate the menu.
How to block someone on Facebook and Instagram
On Facebook, visit the person's profile, tap the three dots menu at the top right, and select "Block." On Instagram, go to their profile, tap the three dots in the top right corner, and tap "Block." Once you block someone on either platform, they cannot see your profile, posts, or stories, and they cannot message you or tag you in photos.
The blocked person will not receive a notification that you blocked them, but they may figure it out if they try to visit your profile and see an error message. If you block someone on Facebook, you can still see their public posts and profile if you search for them while logged out, but they cannot see anything about you.
To unblock someone on Facebook or Instagram, go back to their profile, tap the three dots, and select "Unblock." On Instagram, you can also go to Settings > Blocked, find the person, and tap "Unblock." After you unblock someone, they can message you again and see your posts, but you will not automatically follow them again.
How to block someone on Gmail and email
In Gmail, open an email from the person you want to block, click the three dots menu at the top right, and select "Block [person's name]." All future emails from that address go to your Spam folder automatically. You can also block someone by opening Settings, going to the Filters and Blocked Addresses tab, and adding their email address manually.
To unblock someone in Gmail, go to Settings > Filters and Blocked Addresses, find the address in the blocked list, and click "Unblock." The person's emails will then go back to your inbox instead of spam.
On other email services like Outlook or Yahoo Mail, the process is similar but slightly different. In Outlook, right-click an email from the person and select "Block." In Yahoo Mail, click the three dots on an email and choose "Block sender." Check your email provider's help section if you are unsure where the block option is located.
How to block someone on WhatsApp, iMessage, and other messaging apps
On WhatsApp, open the chat with the person, tap their name at the top, scroll down, and tap "Block this contact." On iMessage, open the conversation, tap the contact name at the top, tap the "i" icon, scroll down, and tap "Block this Caller." On Telegram, open the chat, tap the person's name, tap the three dots, and select "Block User."
When you block someone on a messaging app, they usually cannot see that you are online, cannot see your last seen time, and cannot send you messages. Some apps like WhatsApp still let blocked people see your profile picture and status if those are set to public, but they cannot message you or call you.
To unblock someone on WhatsApp, go to Settings > Privacy > Blocked contacts, find the person, and tap "Unblock." On iMessage, go to Settings > Messages > Blocked Contacts, find them, and tap "Unblock." The process is similar on most messaging apps — look for a Blocked or Privacy section in Settings.
What happens when you block someone
When you block someone, the exact outcome depends on the platform. On your phone, their calls and texts still go through, but you do not see them — they go to voicemail or appear as a silent message. On social media, they cannot see your profile, posts, or stories, and cannot message you. On email, their messages go to spam. On messaging apps, they cannot send you messages or see your online status.
The blocked person usually does not get a notification that you blocked them, but they may realize it if they try to call you and hear an unusual message, or if they try to visit your social media profile and see an error. On some platforms like Facebook, they might see a message saying "You cannot add this person as a friend right now."
Blocking does not delete past messages, calls, or emails between you and that person. You can still see the old conversation history on your end, but the blocked person cannot contact you going forward. If you unblock them later, they can message you again, but the conversation history remains.
Frequently Asked Questions
Can someone tell if I blocked them?
They will not get a notification, but they may figure it out. On phone calls, they might hear a message saying the call cannot go through. On social media, they will see an error if they try to visit your profile. On messaging apps, they might notice their messages are not being delivered. The clearest sign is if they try to call and it goes straight to voicemail every time.
What is the difference between blocking and reporting someone?
Blocking stops them from contacting you. Reporting tells the platform that the person violated their rules — for example, by sending threats or spam. You can block someone without reporting them, or report them without blocking. Reporting usually triggers a review by the platform's team, while blocking is just a personal action.
If I unblock someone, will they know?
No, they will not get a notification. They will only know if they try to contact you and suddenly can reach you again. On social media, they will not see a message saying you unblocked them — they will just be able to see your profile and message you again if they try.
Can I block someone and still see their posts on social media?
No. When you block someone on Facebook or Instagram, you cannot see their profile, posts, or stories. If you want to see their posts but prevent them from seeing yours, you should unfriend or unfollow them instead of blocking. You can also adjust your privacy settings so only certain people see your posts.
Will blocking someone delete our past messages?
No. On your phone, email, or messaging app, the old messages stay in your conversation history. You can still read them, but the blocked person cannot send you new messages. If you unblock them later, the conversation history is still there. On social media, blocking does not delete past messages, but the blocked person cannot see them.