The basic method depends on which app and device you're using
Adding a person to an existing group text is straightforward on most platforms, but the exact steps change depending on whether you're using iMessage, Android Messages, WhatsApp, Signal, or another app. On iPhone with iMessage, you open the conversation, tap "Details" in the top right, scroll down, and tap "Add Contact." On Android with Google Messages, you tap the three dots at the top, select "Add person," then choose who to add. WhatsApp and Signal both let you tap the group name at the top and find an "Add member" or "Add participant" option.
The person you add will see the full conversation history by default on most platforms — they'll be able to read everything that was said before they joined. This matters if your group has been discussing something private. Some apps let you control this: Signal, for instance, lets you choose whether new members see the message history, though you have to set that up before adding them.
Key Takeaways
- iPhone iMessage groups: open the conversation, tap Details, scroll down, and tap Add Contact to invite someone new.
- Android Messages groups: tap the three dots menu, select Add person, and choose the contact you want to include.
- WhatsApp and Signal groups: tap the group name at the top of the screen to find the Add member or Add participant option.
- New members can usually see the entire message history unless you've configured the app to hide it before they join.
- Some messaging apps require the group creator or an admin to add new people, while others let any member do it.
iPhone iMessage group texts
Open the group conversation you want to add someone to. In the top right corner, tap "Details" — it looks like an "i" in a circle. This opens a panel showing everyone in the group and the conversation settings.
Scroll down until you see "Add Contact." Tap it, then select the person from your contacts list. If the person isn't in your contacts yet, you can type their phone number or email address directly. Once you've selected them, they'll be added to the group when ready and will see all previous messages.
If you're the group creator, you can also remove people from this same Details panel by swiping left on their name. On some older iOS versions, you may need to tap "Edit" first.
Android Messages and Google Messages group texts
Open the group conversation. Tap the three-dot menu icon at the top right of the screen. Select "Add person" from the dropdown menu. A list of your contacts will appear — tap the person you want to add.
Google Messages will add them to the group right away. If you're using a different Android messaging app (Samsung Messages, for example), the steps are similar: look for a menu option that says "Add member," "Add contact," or "Manage group." The exact wording varies by app.
Unlike iMessage, some Android messaging apps limit who can add people to a group — only the creator or designated admins may have this permission. Check the group settings if you don't see an Add person option.
WhatsApp and Signal group chats
In WhatsApp, open the group chat and tap the group name at the very top of the screen. This opens the group info page. Scroll down and tap "Add participants." Select the contacts you want to add — you can add multiple people at once. Tap the checkmark or confirm button when you're done.
Signal works almost the same way: tap the group name at the top, then look for "Add members" or a plus icon. Select the people you want to add and confirm. Both apps will notify the group that new members have joined.
WhatsApp lets you control whether new members see the chat history — this setting is in the group settings under "Group info." Signal gives you the option to hide history when you add someone, but you have to choose it at the moment of adding them, not after.
What happens when you add someone to a group
The new person will usually receive a notification that they've been added to the group. On iMessage and Android Messages, they'll see the full conversation history when ready. On WhatsApp and Signal, the default is also to show history, but you can change this before adding them.
The group will typically show a system message saying "[Name] was added to the group" or "[Name] joined the group," depending on the app. Everyone in the group will see this notification. Some apps let you customize whether this message appears.
Once someone is added, they have the same permissions as other members — they can send messages, see all previous messages, and (on most apps) add other people themselves. If you want to restrict what they can do, you'll need to make them a regular member rather than an admin, which is a setting you control in the group info.
Removing someone from a group text
If you need to remove someone, the process is similar to adding them. On iPhone, open Details, scroll to the member list, and swipe left on their name, then tap "Remove." On Android Messages, tap the three-dot menu, select "View members," find the person, and tap the minus icon or "Remove."
WhatsApp and Signal both let you tap the group name, find the member in the list, and swipe or tap to remove them. Only admins or the group creator can remove people on most platforms — regular members cannot kick others out.
When you remove someone, they lose access to the group when ready. They won't be able to see new messages, but they'll still have the message history that was visible to them before removal on their own device.
Privacy and security when adding people
Adding someone to a group means they'll see everything that's been said in that conversation. If your group has discussed sensitive information — financial details, health information, or personal conflicts — consider whether the new person should have access to that history. Some apps let you start fresh by creating a new group instead.
On encrypted messaging apps like Signal and WhatsApp, messages are encrypted end-to-end, which means the app itself can't read them. But the people in the group can. Adding someone you don't fully trust means they'll have access to all those encrypted messages. There's no way to selectively hide older messages from a new member on most platforms.
If privacy is a concern, you can create a new group with just the people you want going forward, or you can have a conversation with the new member about what information in the group is sensitive and should stay private.
Frequently Asked Questions
Can I add someone to a group text without them knowing?
No. All messaging apps send a notification when someone is added to a group, and the group will show a system message that they've been added. They'll see this when ready on their device. You cannot add someone silently.
What if someone I want to add isn't in my contacts?
On iMessage, you can type their phone number or email address directly into the Add Contact field. On Android Messages, WhatsApp, and Signal, you'll need their phone number or username in your contacts first. If they're not there, add them to your contacts, then add them to the group.
Can I add someone to a group if I'm not the creator?
On iMessage, Android Messages, and WhatsApp, any member can usually add people. On Signal, it depends on the group settings — the creator can restrict this to admins only. Check the group info to see if you have permission. If you don't see an Add option, you're not allowed to add people to that group.
Will the new person see messages sent before they were added?
Yes, by default. On iMessage, Android Messages, WhatsApp, and Signal, new members see the full message history. Signal is the only app that lets you hide history before adding someone — you choose this option when you add them. On the others, there's no way to hide old messages from a new member.
What's the difference between adding someone to iMessage versus SMS group texts?
iMessage groups (blue bubbles on iPhone) have more features — you can add people, remove people, and customize settings. SMS group texts (green bubbles) are more limited. On some iPhones, you can't add people to SMS groups at all; you have to create a new group. Check whether your group is iMessage or SMS by looking at the bubble color.