How to send messages to others on iPad? I tried several times, but it hasn't arrived yet.

If your ipad is 3g or 4g version, and you check the SIM card, you can definitely send messages to others. When both parties open imessage, they will take imessage and send messages with traffic. If one party doesn't open imessage, then you can only send SMS, and then your network card will pay.

If your ipad is a wifi version, you can only send messages through imessage. The method is as above. Both parties must open imessage, and then you must know each other's mobile phone number, apple id and so on. If not, you can't send a message.