Method 1: Check the phone internet connection Make sure your phone has the latest version of Viber installed.Make sure your phone is running on the latest software version.One problem that you might encounter while trying to use this app on your mobile device is when it can’t send out a message. Cannot send out text messages using Viber app

An internet connection is required ( Wi-Fi or mobile data) to use this service which is free except for calls made to landlines or phones that don’t have the Viber app installed. It provides end to end encryption for all messages and calls allowing for better communication security. Viber is a call and messaging app that was first released in 2010 and is available for the Android, iOS, Windows, Linux, and MacOS platforms. There are several factors that can cause this issue such as the phone internet connection, you have been blocked by the receiver, or a corrupted app. Which triggers the subscribe callback as described below.The Viber cannot send messages problem occurs when you are trying to send out a message to a person or group of people. Will not trigger a subscribe callback, only a message callback (see When a user sends its first message to a account the user will beĪutomatically subscribed to the account. User sends message to the account (both Public Accounts and bots) Sending a message to a user will be possible only after the user has subscribed to the Public Account by pressing the subscribe button or by sending a message, or by sending a message to a bot (see subscribed callback for additional information).īefore an account can send messages to a user, the user will need to The send_message API allows accounts to send messages to Viber users who subscribe to the account. You'll receive callbacks containing user unique ID to your webhook if a user subscribes to your public account, and ONLY THEN you'll be able to send message to that user. Danny Dainton mentioned the docs on how you can get data including unique ID about your own account not about somebody else!

What is viber message