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    Smartphone displaying chat bubbles with a red error icon, beside a WiFi router, laptop, and tools on a blue-lit desk.

    Phone Won't Send Texts but Calls Work Fine: What's Wrong

    mobile repair
    sms
    mms
    troubleshooting
    texting
    android
    Author: Fix My PC Store Editorial TeamPublished: 10/10/2026Last Updated: 10/10/2026

    TL;DR: Calls and texts use different channels. Calls use the voice network; SMS and MMS use a separate data or signaling path. A stuck message, wrong APN setting, or a glitchy messaging app can block texts while leaving calls untouched. Work through the steps below in order.

    What you need

    • Your phone (Android or iPhone)
    • Access to carrier account settings (online or via carrier app)
    • About 10-15 minutes
    • A second phone or someone who can confirm they're receiving your messages

    Step 1: Check if it's one contact or everyone

    Send a test text to two or three different people. If only one contact fails, the issue is likely on their end or a blocked-number situation. (Yes, people block others and never mention it. Awkward.)

    If nobody receives your texts, move on.

    Hand holding iPhone showing blue and gray chat bubbles with a red exclamation error icon, in a tech workshop setting.
    A failed outgoing message with a delivery error is often the first visible sign that texts are blocked while calls still work.

    Step 2: Look at the failed message itself

    Android usually shows a red exclamation mark next to a failed message. iPhone shows a red "Not Delivered" link. Long-press the failed message and delete it. A single corrupt outgoing message can jam the entire message queue.

    After deleting, try sending a fresh, short text with no attachments.

    Step 3: Toggle Airplane Mode

    Swipe down and turn Airplane Mode on. Wait 15 seconds. Turn it off. This forces the phone to re-register with the carrier network. It sounds dumb. It works more often than it should.

    Step 4: Restart the phone

    Not sleep, not lock. A full power-off restart. Clears cached states that a simple lock won't touch.

    Step 5: Check message center number (Android)

    On Android, the SMS Message Center number routes your texts through the carrier. If it's blank or wrong, texts fail silently while calls work fine.

    Where to find it:

    • Open your default messaging app
    • Settings > More Settings (or Advanced) > Text Messages > Message Center
    • The number should be pre-filled by your carrier. If it's blank, call your carrier and ask for the correct SMSC number for your account.

    iPhone doesn't expose this setting directly, so skip to Step 6 if you're on iOS.

    Step 6: Confirm MMS is enabled and APN settings are correct

    MMS (picture messages and group texts) requires mobile data, even if you're on Wi-Fi. If mobile data is off, MMS fails. SMS should still work, but some carriers and apps blur this line.

    Android:

    • Settings > Network > Mobile Network > enable mobile data
    • Check APN settings match your carrier's published settings (search "[your carrier] APN settings" on their official support page)

    iPhone:

    • Settings > Messages > enable MMS Messaging and Group Messaging
    • Settings > Cellular > Cellular Data, make sure it's on

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    Step 7: Clear the messaging app cache (Android)

    Settings > Apps > your default messaging app > Storage > Clear Cache. Do not clear data unless you want to lose message history. Cache only.

    On iPhone, you can't clear app cache the same way. Instead, offload the app: Settings > General > iPhone Storage > Messages > Offload App. Reinstall it after.

    Step 8: Check if iMessage is stuck (iPhone to iPhone)

    If you're texting another iPhone user and messages show as green instead of blue, iMessage dropped to SMS. That's fine, usually. But if the message just sits and spins:

    • Settings > Messages > toggle iMessage off, wait 30 seconds, toggle back on
    • Sign out of iMessage under your Apple ID, sign back in

    iMessage outages do happen. Check Apple's System Status page to rule that out.

    Step 9: Reset network settings

    This clears saved Wi-Fi passwords, Bluetooth pairings, and APN settings. Your carrier APN gets re-pushed automatically on most modern carriers. Do this only after the steps above, because it's a bigger reset.

    Android: Settings > General Management > Reset > Reset Network Settings

    iPhone: Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings

    After the reset, reconnect to Wi-Fi and retest texting.

    Step 10: Check for carrier-side issues

    Log into your carrier account online. Look for account flags, suspended service, or unpaid balance. (A past-due balance can silently throttle or block messaging without touching voice service.) Call your carrier if you see anything unusual, or just to confirm your SMS/MMS is provisioned correctly.

    Diagnostic decision table

    Symptom Most likely cause Start at step
    One contact won't receive texts Block or their carrier issue Step 1
    All texts fail, MMS and SMS Carrier account or network reset needed Step 3, then Step 9
    MMS fails, SMS works Mobile data off or APN wrong Step 6
    iPhone texts spin and don't send iMessage glitch Step 8
    Android texts show red exclamation Stuck message or wrong SMSC Step 2, then Step 5
    After a SIM swap or carrier change APN settings not updated Step 6, then Step 9

    Common mistakes

    Blaming the hardware immediately. Calls working means the radio and SIM are fine. This is almost never a hardware fault.

    Skipping the stuck-message step. One bad message in the queue blocks everything behind it. Deleting it takes five seconds and fixes the problem surprisingly often.

    Clearing app data instead of cache. You lose your entire message history. Clear cache first, always.

    Assuming Wi-Fi fixes everything. MMS requires cellular data on most carriers regardless of Wi-Fi status. Turning Wi-Fi off temporarily can actually confirm this is the issue.

    Ignoring account status. Carriers are not shy about soft-blocking messaging when accounts have issues, but they usually leave voice active. Always rule this out.

    Bottom line

    Start with the simplest fixes: delete the stuck message, toggle Airplane Mode, restart. If that doesn't work, walk through the APN and messaging app settings. Nine times out of ten this is a software or account configuration problem, not broken hardware.

    If you've worked through all of this and your phone still won't send texts, it's possible you're dealing with a deeper software fault or a SIM issue worth having looked at in person. Fix My PC Store handles mobile device diagnostics at 10140 Okeechobee Blvd, West Palm Beach, or you can reach us at 561-819-9999. Initial checks on most devices don't cost you anything to start.

    Cracked screen or a phone that won't hold a charge?

    Bring it in. Most phone and tablet repairs are same-day, with parts that actually last.

    Get a repair quote

    Frequently Asked Questions

    Does this problem mean my SIM card is damaged?
    Not necessarily. Calls and texts both use the SIM, so a dead SIM would usually break both. If calls work fine, the SIM is almost certainly intact. A SIM issue is more likely if the problem started right after a SIM swap or physical drop.
    Why do group texts fail when regular texts go through?
    Group texts on Android use MMS, which requires active mobile data. If mobile data is off or your APN settings are wrong, group texts and picture messages fail while plain SMS still works. Check Settings and confirm mobile data is enabled.
    Can a software update cause texts to stop working?
    Yes, occasionally. A carrier settings update or OS update can reset APN values or toggle messaging permissions. If the problem started right after an update, go straight to Step 6 and check your APN and MMS settings.
    What if texting works on Wi-Fi but not on cellular?
    That's a strong sign of a carrier-side issue or incorrect APN settings. Your phone is routing MMS over Wi-Fi when available and failing on the cellular path. Compare your APN settings against your carrier's published values and contact them if the settings look correct but the problem persists.

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