Originally Posted by
onlyoneromeo And for those who say it runs on data alone then why does it disconnect when you remove your sim card and needs to verify via sms?
Also,
Settings -> Wi-Fi: turn it off.
Settings -> Data usage: turn off Mobile data
Now, try to send a WhatsApp message. Instead of one checkmark (means the message was received by WhatsApp servers) or two checkmarks (means the message was delivered to the recipient) you will see a small clock (which, apparently, means waiting for a connection).
Re-enable Wi-Fi and/or Mobile data and, within moments, your "waiting" message will be sent.
Original poster: have you tried
support@whatsapp.com ?