iPhone Blue Bubbles Turned Green: How to Fix It

Messages that used to be iMessages now send as text. This page explains what it does, how to use it on an iPhone and which carriers it applies to.

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Why does this happen and how do I fix it?

Apple's definition is exact: iMessages go between Apple devices over Wi-Fi or cellular data and appear in blue bubbles; everything else uses RCS, SMS or MMS, requires a text-messaging plan, and appears green.

So a conversation turning green means iMessage could not be used. Either the recipient is no longer on an Apple device or has iMessage off, or your own iMessage has lost its phone-number registration — which is exactly what Apple describes happening after setting up a new device, alongside conversations splitting into separate threads.

Delivered as Text Message on a single message is the same story at a smaller scale: iMessage was unavailable at that moment and iOS fell back to SMS so the message would still arrive. That is a feature working, not a fault, unless it happens every time.

What should I try, in order?

1. Check whether it is only one contact. One green conversation among blue ones means that person is not on iMessage — nothing on your phone will change it.
2. If everything went green, open Settings, Cellular and confirm your phone line is on. On multiple SIMs, confirm the number you expect is selected and turned on.
3. Open Settings, Apps, Messages, turn iMessage off, wait a few seconds, and turn it back on.
4. Tap Send & Receive and make sure your phone number is listed and ticked as the number you start conversations from.
5. Restart the iPhone and give iMessage a few minutes to reactivate — activation runs in the background and can take a while.
6. If iMessage stays stuck on Waiting for Activation, confirm the date, time and time zone are automatic, then check that your carrier is not blocking the activation SMS iMessage sends.

Which carriers does this apply to?

Published for	any iPhone, Verizon, AT&T, T-Mobile and UScellular
Type	iOS setting
Good to know	You cannot force a blue bubble to somebody who is not using iMessage. Green to an Android recipient is correct behaviour, and on supported carriers those messages now use RCS rather than plain SMS.

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