Why is my WhatsApp Business not working? Fixes for every common problem

When WhatsApp Business stops working, customers do not wait; they message the next shop. This guide gets you from symptom to fix fast: find what you are seeing in the table, then follow the steps, all checked against WhatsApp's help centre in October 2026.

By Ritchie, ReplyKit · Published 17 October 2026 · 9 min read

Is it your phone, your connection or your account? A 60-second check

1. Open a website in your phone's browser. If it does not load, it is your connection, not WhatsApp.
2. Send yourself a test from another phone. If it arrives on WhatsApp Web but not the phone, the phone is the problem.
3. Look at the top of the app. A message such as "Your account is restricted right now" or "This phone number can't use WhatsApp" means an account action, and no phone fix will help.
4. Check for an update in the Play Store or App Store. WhatsApp says registration may fail on an old version.

WhatsApp Business problems: symptom, likely cause, fix

WhatsApp Business not opening or keeps crashing

WhatsApp lists memory and storage issues, outdated app or system, compatibility, device problems, bugs, corrupted data or cache, and network issues as the usual causes. Work through the fixes in this order:

1. Restart the phone.
2. Update your phone's system and the WhatsApp Business app.
3. On Android, clear the cache: phone Settings, Apps, WhatsApp Business, Storage, Clear cache. WhatsApp says this does not delete your chats.
4. Close other apps and free up storage.
5. As a last step, back up your chats (Settings, Chats, Chat backup), then uninstall and reinstall.

Also check your phone is still supported. As of October 2026 WhatsApp supports Android 6.0 and newer and iPhones on iOS 15.1 and newer, and says that from 30 November 2026 only iOS 15.5 and newer will be supported. Unofficial modified apps such as "GB WhatsApp" can stop working and log you out; WhatsApp says using them can lead to a ban.

WhatsApp Business hanging, freezing or slow

A phone that is almost full is the most common reason, and business accounts fill up fast with photos, PDFs and voice notes from customers.

1. In WhatsApp Business, go to Settings, Storage and data, Manage storage. The space WhatsApp uses is shown at the top.
2. Sort by Largest and delete videos and files you no longer need. You can also open a single busy chat, tap its name and choose Manage storage.
3. Remember deleted items may still sit in your phone's gallery or files, so check there too.

Before deleting anything you may need for an order or dispute, export that chat. Our guide to backing up and exporting WhatsApp Business chats shows how.

WhatsApp Business messages not delivering

Read the ticks first. WhatsApp's meaning for each:

Fixing a clock. WhatsApp's connection checklist: switch between Wi-Fi and mobile data to see which one fails, turn flight mode on and off, turn Data saver off, turn Data roaming off, reconnect or change Wi-Fi, reboot the router, and ask your mobile provider to check your APN settings. Office and campus Wi-Fi sometimes blocks WhatsApp.

Broadcasts not arriving. A broadcast list message only reaches contacts who have saved your number in their phone. That is a rule, not a fault. Our broadcast list guide explains the alternatives.

One customer only. If messages to everyone else deliver, they may have blocked you. WhatsApp says it cannot tell you whether someone blocked you or remove a block.

WhatsApp Business notifications not working

If messages only appear when you open the app, it is a push notification problem. WhatsApp's checklist for Android:

1. Android 13 and newer: phone Settings, Apps, WhatsApp Business, Notifications, turn on Allow notifications.
2. In WhatsApp Business: Settings, Notifications; make sure the tone is not set to Silent.
3. Turn background data off and on: phone Settings, Apps, WhatsApp Business, Mobile data usage.
4. Exclude WhatsApp Business from battery optimization. WhatsApp lists brand paths, for example on Samsung: Settings, Battery and device care, Battery, Background usage limits, Never sleeping apps, add the app. On Xiaomi or Redmi: Settings, Battery and performance, App battery saver, No restrictions.
5. Check Do not disturb or Focus mode, and whether a group is muted.

Missed notifications cost a business more than most crashes, because nothing looks broken. If you rely on a phone to catch leads, read the true cost of a missed WhatsApp message.

WhatsApp Business verification code not coming

1. Enter the number in full international format and remove any leading 0. For example, a US number is entered as +1 408 XXX XXXX. Argentina needs a 9 after +54, and Mexico needs a 1 after +52.
2. Wait for the timer to finish. WhatsApp says this can take up to 10 minutes. Do not guess the code, or you will be locked out for a while.
3. Tap Call me when it appears; an automated voice reads the code.
4. Check you have signal, enough prepaid balance to receive SMS, roaming on if abroad, and no call-blocking or task-killer apps.
5. Try Wi-Fi Calling in your phone settings if mobile signal is weak.

If you have added an email address to your account, WhatsApp can send the code by email when you log back in to an existing account.

WhatsApp Business showing the wrong number, or "not on WhatsApp"

You registered the wrong number. Check which number is registered: Settings, then tap your profile photo. To move the account to the right number, use Settings, Account, Change number, entering both numbers in international format. Back up again afterwards, because WhatsApp says backups are tied to the number they were made with.

Customers say your number is "not on WhatsApp". Usually they saved it without the country code or with a leading 0. Give them a click-to-chat link instead: wa.me followed by your full number in international format, with no plus sign, zeros, brackets or dashes. Also confirm the number is still active on WhatsApp Business; a number can be on only one of WhatsApp or WhatsApp Business at a time.

A new SIM came with a ban. WhatsApp notes that if you got a recycled number, the previous owner may have broken the rules and caused the ban. Request a review in the app.

WhatsApp Business restricted or banned

These are different, and the fix is different.

• Restricted ("Your account is restricted right now"): temporary. You can keep chatting with people you have talked to before, but cannot start chats with new contacts, create groups, add members or use linked devices. It ends automatically. To see the time left, tap New chat and pick someone you have never messaged.
• Banned ("This phone number can't use WhatsApp"): tap Request review. WhatsApp says most reviews finish within 24 hours; if there is no review option, the ban is final. Contacting WhatsApp other ways does not speed it up.

WhatsApp links restrictions to signs of spam, automated or bulk messaging. Our guide on what to do when WhatsApp restricts your number covers the appeal and how to keep customers served meanwhile.

What if WhatsApp Business is still not working?

Search WhatsApp's help centre at faq.whatsapp.com for the exact wording of any error you see, and keep the app updated, because WhatsApp says updates are released regularly and may contain fixes for bugs. If WhatsApp Web works while the phone does not, keep answering from the computer while you sort the phone out.

We make ReplyKit, so weigh our view accordingly. ReplyKit will not fix a broken phone app, and it cannot help with a restricted or banned number. Where it helps is the cost of downtime: it answers WhatsApp and website chats with an AI agent from your own content and keeps conversations, leads and bookings in its own inbox and CRM. It connects through Quick Connect, a QR pairing that is unofficial, not the WhatsApp Business API, and a number can be restricted, so read will WhatsApp ban my number for automation? and use a dedicated number. If missed chats are your real problem, try the 7-day free trial, no credit card; plans start at $29 a month.

Frequently asked questions

ReplyKit is an independent product and is not affiliated with or endorsed by Meta or WhatsApp. Fixes follow WhatsApp's help centre as of October 2026; menu names can differ by version, region and phone brand. Third-party prices and features were checked in October 2026 and may change.