Android Not Sending Text Messages

When texts won’t send on Android, the cause is usually signal, SIM, or Messages settings, and you can fix it with a quick set of checks and resets.

“Message not sent” can drive you up the wall. You’ve got bars. You can browse. Yet your text sits there, stuck on “Sending,” or it fails after a few seconds.

There are only a few places this can break: your carrier line, your phone’s connection to the tower, your SIM/eSIM setup, or the messaging app’s settings. This guide walks through the fastest path first, then the deeper fixes that solve stubborn cases.

Spot The Exact Failure Before You Change Settings

Texting on Android can mean three different things. SMS is plain text over your carrier network. MMS covers photos and many group messages, and it often needs mobile data and correct APN settings. RCS (Chat features in Google Messages) uses Wi-Fi or mobile data and can fail even when SMS is fine.

Run these quick tests. They tell you which lane is blocked so you don’t waste time.

Send A Short SMS — Text “test” to a contact you’ve messaged before.
Send To A Second Contact — Try another number to rule out a contact-level issue.
Send A Photo — Attach one small image to test MMS and mobile data behavior.
Try A New Thread — Start a fresh conversation instead of replying in an old one.

If short SMS fails to everyone, think signal, SIM, or carrier routing. If SMS works but photos fail, treat it as MMS/APN/data. If only RCS fails, the fix is usually inside Google Messages.

Android Not Sending Text Messages After A SIM Swap Or Plan Change

This is the most common timing clue. If android not sending text messages started right after a new SIM, an eSIM transfer, a number port, roaming, or a plan update, your phone may be half-registered on the network. It can look connected while SMS routing is still off.

Refresh The Radio Connection

These steps force your phone to re-check in with the network. They’re fast and safe.

Toggle Airplane Mode — Turn it on, wait 15 seconds, then turn it off.
Restart The Phone — Power off fully, wait a few seconds, then power on.
Switch Mobile Data Off And On — Flip it off, wait a moment, then flip it on.

Check SIM And Line Status

A loose SIM, a disabled line, or an eSIM that didn’t finish setup can block outgoing texts.

Reseat A Physical SIM — Power off, remove the SIM, reinsert firmly, then boot up.
Confirm The Active SIM — Settings → Network & internet → SIMs, then make sure the correct line is enabled.
Place One Test Call — Calls failing too points to a bigger carrier or SIM issue.

Verify The Message Center Number

Some Android phones store an SMSC (message center) number used for SMS routing. If that field is missing or wrong, SMS can fail. Samsung notes you can check the “Message center” field in text message settings and compare it with your carrier’s published value.

Fix The Messages App Before You Reset The Whole Phone

App settings and app state cause a huge share of sending failures. This section is the sweet spot: it fixes a lot without blowing away your saved Wi-Fi networks.

Confirm Your Default SMS App

Android sends SMS through the default messaging app. If you installed another texting app, it may have taken over, and your usual app may be trying to send without the proper role.

Set The Default SMS App — Settings → Apps → Default apps → SMS app, then select the one you use.
Pause Other Messaging Apps — Temporarily disable other texting apps, then retest sending.

Clear Cache And Force Stop

Cache corruption can cause “stuck on sending” behavior. Start with cache only. It’s the lowest-risk cleanup.

Clear Cache — Settings → Apps → Messages → Storage & cache → Clear cache.
Force Stop The App — In the same screen, tap Force stop, then reopen Messages.
Update Messages — Open Play Store, search for Messages, then update if available.

Check Blocks And Send Limits

Sometimes it’s not “all texting.” It’s one thread, one number, or one type of recipient.

Review Blocked Numbers — In Messages settings, check blocked numbers and unblock the target.
Fix A Saved Number — Re-save the contact, then send from a new thread.
Try A Non-Short-Code Number — If only bank codes fail, your carrier may be filtering that traffic.

Reset RCS Chat Features In Google Messages

If RCS is enabled, a stuck verification state can make sends fail in confusing ways. Google Messages includes options to switch a failed RCS send over to SMS/MMS, and Google also provides a page to disable chat for a number when you switch phones or SIMs.

Turn RCS Off — Messages → profile icon → Messages settings → RCS chats (or Chat features) → toggle off.
Enable Resend As SMS — Turn on the option that resends as SMS/MMS when a send fails.
Deregister RCS If Needed — Use Google’s disable-chat page for your number, then try setup again later.

Get MMS And Group Texts Working Again

If plain SMS works but photos or group messages fail, treat it as MMS. MMS often needs mobile data and correct APN settings. Google’s Messages guidance calls out mobile data and resetting APNs as a fix path for MMS issues.

Confirm Data Is Allowed For Messages

MMS can fail when mobile data is off, restricted, or blocked by data-saving modes.

Turn On Mobile Data — Switch cellular data on, then retry the same photo.
Disable Data Saver For A Test — Turn it off, retest, then turn it back on if you want.
Allow Background Data — In app data settings, allow Messages to use background data.

Reset APN Settings To Default

APNs tell your phone how to reach carrier data services used by MMS. A wrong APN can break MMS and group sends.

Open APN Settings — Settings → Network & internet → SIMs → Access point names (menu names vary by brand).
Reset APNs — Use the menu option to reset to default, then restart the phone.
Retest With One Photo — Send a small image to one person before big group chats.

Use This Symptom Table To Pick The Next Move

What You See	Likely Cause	Best First Fix
SMS fails to everyone	Signal/SIM/carrier routing	Airplane mode toggle, restart, check SMSC
SMS works, photos fail	MMS needs data or APN	Enable mobile data, reset APN to default
RCS fails, SMS works	RCS setup stuck	Toggle RCS off/on, enable resend as SMS
Only one contact fails	Block or bad saved number	Unblock, re-save, start a new thread

Reset Network Settings Without Losing Photos Or Apps

If you’ve worked through the app checks and you still can’t send, a network reset is the biggest jump in success rate without wiping your phone. It clears saved Wi-Fi networks, Bluetooth pairings, and cellular settings, then rebuilds them.

Samsung’s messaging troubleshooting includes steps like checking carrier service, clearing cache, and resetting network settings when message behavior is broken.

Do The Network Reset

The menu wording varies, but the idea is the same across brands.

Open Reset Options — Settings → System (or General management) → Reset options.
Reset Network Settings — Tap the network reset item, confirm, then reboot.
Test SMS Right Away — Send one short text before changing other settings.

Update Carrier And System Components

Carrier configuration updates and system updates can affect messaging reliability, especially after a device update or a carrier switch.

Install System Updates — Settings → System → System update, then install pending updates.
Update Carrier Services — In Play Store, update Carrier Services if it’s installed.
Reboot Once More — Restart after updates so new settings load cleanly.

When The Issue Is The Account Or The Hardware

If android not sending text messages keeps happening after the steps above, the cause is often outside the app. It can be a line-level routing issue, a damaged SIM, or a phone radio problem.

Ask Your Carrier To Check SMS Provisioning

A carrier rep can verify that SMS is enabled and routed properly for your line, especially after a port. Bring clear details: your phone model, Android version, the error text you see, and whether SMS, MMS, and RCS each work.

Test Your SIM In Another Phone — If SMS fails there too, the issue is tied to the line or SIM.
Try Another SIM In Your Phone — If that SIM can send, your phone hardware is likely fine.
Replace The SIM If Needed — A fresh SIM can fix silent routing failures.

Check Dual SIM Settings

On dual-SIM phones, sending can fail if the wrong SIM is set for messages or if one line is paused.

Select The Correct SIM For SMS — In SIM settings, set the default for messages to the intended line.
Disable The Other Line Temporarily — Turn off the second SIM, then retest sending.
Confirm The Active Data SIM — MMS and RCS can break if data is tied to a different line.

Rule Out A Conflicting App With Safe Mode

VPNs, firewalls, call blockers, and “cleaner” apps can interfere with messaging. Safe mode loads Android with core apps so you can test without third-party interference.

Boot Into Safe Mode — Use your brand’s safe mode method from the power menu, then restart into safe mode.
Send One Test Text — If it sends in safe mode, a third-party app is getting in the way.
Remove Recent Installs — Uninstall apps added around the time texting broke, then reboot normally.

Once texting is back, keep one simple habit: after major updates, do one test SMS and one test photo to confirm both SMS and MMS lanes are healthy. It saves you from discovering a problem at the worst time.