Joke Collection Website - Public benefit messages - Why are the contact numbers displayed in Apple's messages all blue, green and gray, just like this, but the strangest thing is the gray contact.

Why are the contact numbers displayed in Apple's messages all blue, green and gray, just like this, but the strangest thing is the gray contact.

Are you new to iPhone? Tell you:

Blue is a short message between two imessage-enabled Apple IOS systems and Apple. Blue text messages are free as long as the traffic. Even if your mobile phone is in arrears, as long as there is a wireless network, as long as the other party is also an Apple device and imessage is turned on, you can send it!

The green one is your normal SMS (the other party is not Apple or the other party has not turned on the imessage function) and charges the SMS fee of the operator!