Joke Collection Website - Public benefit messages - I bought a new mobile phone without a mobile phone card, but someone automatically sent me a message. Was wifi turned on at that time because of the wifi network relationship?

I bought a new mobile phone without a mobile phone card, but someone automatically sent me a message. Was wifi turned on at that time because of the wifi network relationship?

It's really strange that you can receive text messages without a mobile phone sim card. How was it sent to you? If it is an instant chat tool such as WeChat, Fetion and QQ, it is really related to WIFI, or it may be a short message sent to all mobile phones under this WIFI.