In order to allow WahtsApp to pass trough ASA firewall properly (inside -> outside) you need to allow:
example: access-list acl_inside line 1 extended permit udp object insidenet any eq 3478
example: access-list acl_inside line 2 extended permit tcp object insidenet any range 5222 5228
Also, I assume you have already allowed:
Regards,
Stefan Rusev