If you're on WiFi when using iMessage or FaceTime it will have no effect on your phone bill.Tks for advice I also know like FaceTime any of our contacts who had Apple gadget. But I question still waiting for reply that I will use net via wifi and I text someone. This will be effect my phone bill.
Go to Settings>Messages>Send as SMS and make sure the switch is turned off. This way, if iMessage is not available, the message will not be sent as an SMS text message.Ok tks now plz guide how will I send only iMessage in phone