You will not be able to send or even read your messages. You will only be able to receive calls and notifications of new messages.
Once your account gets deleted by WhatsApp, you can never ever get it back! Oops!! If you get to the stage where your account gets deleted, this would be permanent and is not an action that is reversible.
Facebook is giving users the chance to export their chat history before May 15. Apps like Telegram already allow users to import their WhatsApp chat history in their apps as a way to make the switch to their apps easier.
The policy update also applies to users who have been inactive. This means inactive users can still accept the update when they become active even after May 15. If they become active with the same phone they’ve been using all along, they can have access to information that has been stored locally on their device.