How to Fix WhatsApp Not Sending Messages: A Step-by-Step Guide

You type out a message, hit send, and the little clock icon just sits there — no single grey tick, no “delivered.” WhatsApp not sending messages is frustrating precisely because the app usually feels instant, so when it stalls, something specific has broken. Almost always it’s one of five things: your connection, a background-data restriction, low storage, a wrong date/time, or an outdated app. This guide walks through each in order, and by the end your messages should be going through again.

One quick thing to check first: a message stuck on a single grey tick means it left your phone but hasn’t reached the other person — often their problem, not yours. A message stuck on the clock icon (no ticks at all) means it hasn’t even left your phone — that’s what this guide fixes.

Step 1: Confirm Your Internet Is Actually Working

WhatsApp needs a live internet connection to send anything. A Wi-Fi symbol or 4G/5G icon at the top of your screen doesn’t guarantee data is flowing.

• Open a browser and load any website. If it doesn’t load, fix your connection first — WhatsApp can’t work without it.
• If you’re on Wi-Fi and it’s flaky, switch to mobile data (or vice versa). A congested home or public Wi-Fi is a very common cause.
• Toggle Airplane mode on for ten seconds, then off, to force a fresh network connection.
• Check that you actually have mobile data left on your plan — an exhausted daily data cap on a prepaid pack will stop WhatsApp cold even though calls and SMS still work.

Step 2: Check WhatsApp’s Background Data and Data-Saver Settings

If messages send fine on Wi-Fi but get stuck on mobile data (or the other way around), a data restriction is the likely culprit. Android’s Data Saver and per-app data limits can quietly block WhatsApp in the background.

1. Go to Settings > Apps > WhatsApp > Mobile data & Wi-Fi (wording varies by phone).
2. Enable Background data and Unrestricted data usage.
3. Go to Settings > Network & internet > Data Saver and either turn it off, or add WhatsApp to the “unrestricted” allow-list.

On Xiaomi, Realme, Oppo, and Vivo phones, also open Settings > Battery, find WhatsApp, and set it to No restrictions / Don’t optimise. These brands’ aggressive battery savers are notorious for freezing WhatsApp in the background, which delays sending and notifications.

Step 3: Free Up Storage Space

WhatsApp needs a little free space to process and queue outgoing messages, especially photos and videos. If your phone’s storage is almost full, sending stalls.

Go to Settings > Storage and check what’s free. If you’re very low, clear some room — delete old downloads, and inside WhatsApp go to Settings > Storage and data > Manage storage to remove large forwarded videos and files you don’t need. Freeing even a few hundred megabytes often gets sending working again.

Step 4: Fix Your Phone’s Date and Time

WhatsApp verifies a secure connection to its servers using your phone’s clock. If the date or time is wrong — common after a phone has been switched off for a while — that secure handshake fails and messages won’t send.

Go to Settings > System > Date & time and turn on Automatic date & time (network-provided). If it’s already on, toggle it off and back on to resync. This is an easy one to overlook and it fixes more sending problems than people expect.

Step 5: Update WhatsApp to the Latest Version

An outdated version can stop working, particularly if your copy is old enough that WhatsApp has begun phasing it out. Open the Play Store, search for WhatsApp, and tap Update if the button is there. If the Play Store itself won’t download the update, that’s a separate issue — our guide on fixing the Play Store when it won’t download apps covers it step by step.

Step 6: Force-Stop and Restart WhatsApp

If the app has been running for days, its background process can get into a bad state. Go to Settings > Apps > WhatsApp and tap Force stop, then reopen it. This clears the temporary glitch without touching any of your chats. A full phone restart does the same job and also refreshes your network connection — often worth doing before anything more drastic.

Step 7: Clear WhatsApp’s Cache

Clearing the cache removes temporary files that may have become corrupted, without deleting your messages. Go to Settings > Apps > WhatsApp > Storage and tap Clear cache (not “Clear data,” which would log you out and can risk your chats if they’re not backed up). Reopen WhatsApp and try sending.

Step 8: Check Whether It’s Just One Chat or Contact

If messages send fine to everyone except one person, the problem is that specific chat, not the app. That contact may have blocked you, deactivated their account, or changed their number. You’ll see one grey tick that never turns to two. There’s no setting to fix this on your end — it’s about the other account. If you simply want a cleaner contact list, here’s how to remove a contact from WhatsApp.

Special Case: Messages Won’t Send After Changing Your Phone or SIM

If sending broke right after you switched phones, restored a backup, or changed your SIM, the likely cause is that your number needs re-verifying. WhatsApp ties your account to your phone number, and it must confirm that number by SMS or call. Open WhatsApp, and if it asks you to verify, make sure the SIM for that number is in the phone and has signal, then request the verification code by SMS. Until the number is verified on the device you’re using, messages won’t go out.

A related trap: WhatsApp only works on one phone as the primary device. If you’ve set the same account up on a second phone, the first one gets logged out and stops sending. Decide which phone is your main device and verify there.

Special Case: Media Sends but Text Doesn’t (or Vice Versa)

Occasionally text messages send fine but photos and videos get stuck, or the reverse. When media specifically fails, it’s almost always storage or a weak connection — large files need both more space to process and a steadier connection to upload. Free up storage and move to a stronger signal. When text specifically fails but media is fine, it’s more likely a temporary glitch in the app; a force-stop and restart (Step 6) usually clears it.

When Nothing Works: Check WhatsApp Isn’t Down

Occasionally the problem is on WhatsApp’s side — a server outage affecting everyone. If you’ve tried everything above and messages still won’t send, check whether friends are having the same issue, or look at a service-status site. During a genuine outage there’s nothing to do but wait; service usually returns within an hour or two. As a final self-help step, you can uninstall and reinstall WhatsApp — but back up your chats first via Settings > Chats > Chat backup so you don’t lose your history.

Run through these in order and you’ll clear the vast majority of “WhatsApp won’t send” problems. Nine times out of ten, it’s the connection, a background-data restriction, or the clock — all fixed in under five minutes.