## Overview

The most frequent WhatsApp issues involve **connection** (channel disconnected), **pairing**
(QR/phone) and **re-authentication** (the session must be redone). Most are fixed by checking the
connection and re-pairing.

## Prerequisites

- Administrator access to the WhatsApp inbox.
- The number's device/source available to re-authenticate if needed.

## Step by step

1. Open the WhatsApp inbox and check the **connection status**.
2. If **disconnected**, try to reconnect/re-authenticate from the inbox.
3. For **WhatsApp Web**, rescan the QR code or re-pair by phone.
4. For **WhatsApp Cloud**, check the credentials and the number's status on Meta.
5. After reconnecting, send a test message to confirm.

## Settings & options

- **Connection status**: connected, pairing, disconnected, logged out.
- **Re-authentication**: redoes the session when WhatsApp requires it.

## Use cases

- Restore a number that dropped after instability.
- Re-pair after swapping/wiping the device.

## Tips, limits & best practices

- Keep the device/source stable and online (for WhatsApp Web).
- Avoid practices that trigger blocks (see the limits & anti-ban article).

## Troubleshooting

- **QR doesn't show**: reload the connection wizard and try again.
- **Drops right after connecting**: check source stability and the gateway webhooks.
- **Cloud error**: verify number, verification and credentials on Meta.

## See also

- [Connect WhatsApp Web (QR pairing)](/hc/ajuda/articles/inboxes-channels-whatsapp-web-zuckzapgo-en)
- [Limits, anti-ban and best practices](/hc/ajuda/articles/faq-limites-anti-ban-boas-praticas-en)