iPhone Not Sending Text Messages: Why & How to Fix

If your iPhone won’t send text messages, the cause is usually a temporary network or iMessage glitch, a wrong settings toggle, or an incorrect phone number, and most cases can be fixed in under five minutes by toggling Airplane Mode, restarting the Messages app, or checking your iMessage settings. Below is a step-by-step guide covering the most common reasons and their fixes, plus what to do when nothing seems to work.

Why Your iPhone Stops Sending Texts

Your iPhone sends texts in two different ways, and the problem often depends on which method is failing:

iMessage (blue bubbles): Uses your internet connection (Wi-Fi or cellular data) to send messages to other Apple devices. If your internet is off, iMessage fails.
SMS/MMS (green bubbles): Uses your carrier’s cellular network, like a traditional phone. If you have no signal or your SMS settings are wrong, these fail.

A message that fails to send will usually show a red exclamation mark with “Not Delivered.” The fix is different depending on whether the bubble is blue or green.

Quick Fixes to Try First

These simple steps resolve the majority of sending issues. Try them in order:

Toggle Airplane Mode: Open Control Center and tap the airplane icon to turn it on, wait 10 seconds, then turn it off. This forces your iPhone to re-register with the cellular network.
Restart your iPhone: Power off and back on. This clears minor software glitches that can block messaging.
Check the recipient’s number: Make sure you’re sending to a full, correct phone number or Apple ID email address. A missing country code or a typo will cause a failure.
Send as SMS automatically: Go to Settings > Messages and turn on Send as SMS. This lets your iPhone fall back to a regular text when iMessage is unavailable.

Fix iMessage-Specific Problems

If your messages are stuck as “Not Delivered” with blue bubbles, the issue is with iMessage itself:

Turn iMessage off and on: Go to Settings > Messages and toggle iMessage off, wait a few seconds, then toggle it back on. This re-registers your phone with Apple’s servers.
Check your internet connection: iMessage needs Wi-Fi or cellular data. Try loading a webpage in Safari to confirm you have internet access.
Sign out and back into your Apple ID: In Settings > Messages > Send & Receive, tap your Apple ID and choose Sign Out. Then sign back in. This often fixes activation issues.
Update your carrier settings: Go to Settings > General > About. If a carrier settings update is available, a pop-up will appear. Tap Update.

Fix SMS/MMS (Green Bubble) Problems

If your texts go through as green but fail to send, the problem is with your cellular connection or SMS settings:

Check your signal: Look at the status bar. If you have “No Service” or “SOS,” you can’t send SMS. Move to a different location or contact your carrier about coverage.
Verify your SMS/MMS settings: Go to Settings > Messages and make sure MMS Messaging is turned on (required for sending photos and videos). Also check that Send as SMS is on.
Reset network settings: Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. This clears saved Wi-Fi passwords and cellular settings, but often resolves stubborn connection issues. You’ll need to re-enter Wi-Fi passwords afterward.

What to Do When Nothing Works

If you’ve tried all the above and still can’t send texts, try these advanced steps:

Update iOS: Go to Settings > General > Software Update. Apple regularly fixes messaging bugs in new iOS versions.
Check if the recipient has blocked you: If only one specific contact fails, they may have blocked your number. This is rare but possible.
Contact your carrier: Sometimes your carrier has a temporary outage or your account has a block on SMS services. Call their support line or check their status page.
Erase All Content and Settings: As a last resort, back up your iPhone and restore it to factory settings. This fixes deep software corruption but should only be done after trying everything else.

Common Misconception: “iMessage is Free”

Many people think iMessage never uses their data plan. While iMessage does not count as an SMS text, it does use your cellular data (or Wi-Fi). If you have a very limited data plan, sending many iMessages could hit your data cap. SMS/MMS messages are billed separately by your carrier and may be unlimited or limited depending on your plan. Always check your carrier’s terms.

Frequently Asked Questions

Why are my texts green instead of blue?

Green bubbles mean the message was sent as SMS/MMS, not iMessage. This happens when the recipient doesn’t have iMessage enabled, when your phone or theirs is offline, or when iMessage is temporarily unavailable. It’s not a problem by itself, but if a green message fails to send, the issue is with your cellular connection.

How do I know if I’m blocked on iMessage?

If you’re blocked, your iMessage will show “Delivered” but the recipient will never receive it. You won’t get a “Not Delivered” error. There’s no reliable way to confirm a block, but if your calls go straight to voicemail and texts never get a reply, it’s possible.

Will resetting network settings delete my photos?

No. Resetting network settings only clears Wi-Fi passwords, Bluetooth pairings, VPN settings, and cellular settings. Your photos, contacts, and apps are untouched.

Why do my texts fail when I’m on Wi-Fi?

If you have Wi-Fi calling enabled, SMS can sometimes fail on a weak Wi-Fi connection. Try turning off Wi-Fi and using cellular data to send the message. Also, make sure your Wi-Fi is actually connected to the internet.

Can a dead battery cause text sending issues?

No, but a very low battery can cause your iPhone to enter Low Power Mode, which may disable background data fetching. This can delay iMessage delivery but rarely stops it entirely. Charge your phone and try again.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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