What iMessage is and how it differs from regular text messages

iMessage is Apple's messaging system that works over Wi-Fi or cellular data instead of the traditional SMS (text message) network. When you send an iMessage to another Apple device user, the message travels through Apple's servers rather than your phone carrier's network. On your iPhone, iMessages appear in blue bubbles, while regular text messages appear in green bubbles.

The main practical difference: iMessage messages are free to send (they use your data plan), show read receipts if the other person has them turned on, and let you send higher-quality photos and videos. Regular text messages cost money if you don't have unlimited texting, and they don't include read receipts or some of the formatting options iMessage offers. If you send an iMessage to someone without an Apple device, it automatically falls back to a regular text message.

Key Takeaways

  • iMessage is turned on by default on most iPhones, but you need to check Settings to confirm it is active on your device.
  • You must be signed in with an Apple ID in Settings to use iMessage; without it, all messages will send as regular texts.
  • iMessage only works when sending to other Apple device users; messages to Android phones automatically send as regular texts.
  • If iMessage is not working, turning it off and back on in Settings often fixes the problem.

Checking if iMessage is already turned on

iMessage comes turned on by default on most new iPhones, so you may already be using it without realizing it. To check, open the Settings app and tap Messages. Look for the iMessage toggle switch near the top of the screen. If it is green and switched to the right, iMessage is already active. If it is gray and switched to the left, iMessage is off and you will need to turn it on.

You can also tell by looking at your message bubbles in the Messages app. Blue bubbles mean the message sent as iMessage. Green bubbles mean it sent as a regular text message. If you see both colors in a conversation, it means some messages went through iMessage and others went through the regular text network.

Turning on iMessage in Settings

Open the Settings app on your iPhone. Scroll down and tap Messages. At the top of the Messages screen, you will see the iMessage toggle. Tap it to turn it on (it will turn green). Your iPhone will connect to Apple's servers and register your phone number and Apple ID for iMessage use.

This process usually takes a few seconds to a few minutes. Once the toggle is green and stays green, iMessage is active. You can now send iMessages to anyone with an Apple device. If you have multiple Apple devices (iPad, Mac, Apple Watch), you can use the same Apple ID on all of them, and iMessages will sync across all your devices.

Making sure you are signed in with an Apple ID

iMessage requires an Apple ID to work. If you are not signed in, the iMessage toggle will either be grayed out or will not stay on. To check your Apple ID status, go to Settings and tap your name at the very top of the screen. If you see your name and email, you are already signed in. If you see "Sign in to your iPhone" instead, you need to sign in first.

To sign in, tap "Sign in to your iPhone," enter your Apple ID email and password, and follow the prompts. Once you are signed in, go back to Settings > Messages and turn on the iMessage toggle. Your phone number and email address will now be registered for iMessage, and other Apple users will be able to reach you through iMessage.

What to do if iMessage is not working after you turn it on

Sometimes iMessage turns on but messages still send as green text messages instead of blue iMessages. The fastest fix is to turn iMessage off, wait 10 seconds, and turn it back on. Go to Settings > Messages, tap the iMessage toggle to turn it off, count to 10, then tap it again to turn it back on. This forces your iPhone to re-register with Apple's servers.

If that does not work, check that you have a strong Wi-Fi or cellular connection. iMessage needs internet to work, so if your connection is weak or drops, messages may fall back to regular text. You can also try signing out of your Apple ID and signing back in. Go to Settings, tap your name, scroll down, and tap "Sign Out." Then sign back in with your Apple ID, and turn iMessage back on in Settings > Messages.

Understanding why some messages stay green

If you send a message to someone with an Android phone or a non-Apple device, it will always send as a regular text message (green bubble) even if iMessage is turned on. iMessage only works between Apple devices. Your iPhone automatically detects whether the person you are texting has an Apple device and routes the message accordingly.

You can also manually force a message to send as a regular text instead of iMessage. In the Messages app, tap and hold on a message you have already sent, then tap "Send as Text Message." This is useful if someone is not receiving your iMessages for some reason and you want to try sending a regular text instead.

Frequently Asked Questions

Do I need to do anything special to receive iMessages?

No. Once iMessage is turned on and you are signed in with your Apple ID, you automatically receive iMessages from other Apple users. They will see a blue send button when they text you, which means their message will come through as iMessage. You do not need to do anything on your end.

Will turning on iMessage cost me money?

No. iMessage uses your data plan (Wi-Fi or cellular data), not your text message allowance. If you have unlimited data, iMessages are completely free. If you have a limited data plan, iMessages will count toward your monthly data usage, but they typically use very little data compared to photos or video.

Can I turn off iMessage for just one person?

Not directly. iMessage is either on or off for all your contacts. However, you can manually send a regular text message to one person by tapping and holding their message and selecting "Send as Text Message." After that, future messages to that person may continue as texts, depending on your settings.

What happens if I turn off iMessage?

All your messages will send as regular text messages to everyone, including other Apple users. You will see only green bubbles in the Messages app. Any iMessage features like read receipts and typing indicators will not work. You can turn iMessage back on anytime by going to Settings > Messages and toggling it back on.

Why does iMessage say "Waiting for set up"?

This message appears when your iPhone is trying to register with Apple's servers but has not finished yet. It usually resolves within a few minutes. Make sure you have a strong internet connection and are signed in with your Apple ID. If it stays stuck on "Waiting for set up" for more than 10 minutes, try turning iMessage off and back on again.