Incase you want to check your Expiry and time interval left Go to SETTINGS -> ACCOUNT -> PAYMENT INFO. There you will find your Payment details and expiry date.
If you account has been warning you, we are here to help you on how to extend validity in 5 simple steps without having to pay any money.
Below are the steps.
Step 1: Open Whatsapp on your Device
Step 2: Go to Settings, click on Account
Step 3: Now click on Delete my account
Step 4: Enter your mobile number in the given field then click on Delete my Account
Now that you are no more on Whatsapp, all you have to do is re-install the app and you will be good to go.
You can now enjoy WhatsApp for another extra year.
Credit: Tech Watch