How long will viber try to send a message?

You may find the answer in the thread:

No, it does not mean that you are blocked once it delivered.   more
Viber doesn't keep messages and it doesn't delete them ... offline. It will keep the message until it will be read ... on the status of the messages, because as they say, if ...   more

67.1k questions

75.8k answers

1.8k comments

4m users

...