- Open Whatsapp
- to delete a Whatsapp account goto Settings > Account > Delete Account
- The above step will permanently delete all your Whatsapp content
If your android mobile is lost just complain to the service provider and they will give you a duplicate SIM at no / minimal cost
- Once you have your SIM you can reactivate the account immediately
Lock the SIM in your stolen phone, you can use a new SIM with the same number to activate WhatsApp on your new phone. This is the fastest way to deactivate your account on the stolen phone. WhatsApp can only be activated with one phone number on one device at a time.