Question
Messaging OdditiesOctober 7, 2026Why are some iPhone message bubbles blue and others green?
Details
Three message types, two colors
Apple's support page splits what the Messages app sends into three kinds. iMessage travels over Wi‑Fi or cellular data between Apple devices only, shows in blue bubbles, supports read receipts and typing indicators, and is end-to-end encrypted. RCS is an industry standard that can reach non-Apple phones, shows in green bubbles, and needs iOS 18 or later plus a carrier that supports it. SMS/MMS is the plain text-message service: also green, not end-to-end encrypted, and it needs a text-messaging plan.
What turns a bubble green
Apple lists four reasons: the person you're texting doesn't have an Apple device; iMessage is turned off on your device or theirs; iMessage is temporarily unavailable on either side; or you may need to update your Messages settings after setting up a new device. Green only tells you the message went by RCS or SMS/MMS — nothing more about the other person.
Getting blue back
Go to Settings > Apps > Messages and turn on iMessage; if needed, tap Send & Receive to choose whether new conversations start from your phone number or email. If the other person has no Apple device, it will stay green no matter what you change. Without Wi‑Fi, iMessage uses cellular data, so data rates may apply. Also, end-to-end encrypted RCS is still in beta, needs iOS 26.5, and only works when both people's carriers support it; if you don't see “Encrypted” and a lock at the top of the conversation, don't assume it's protected.
Also Asked As
iPhone green bubble vs blue bubble · why are my iMessages green · iMessage turned green meaning · iMessage vs SMS difference · why is my iPhone text green