What does it mean that the mobile phone displays "Your operator may charge for the SMS used to activate imessage"?

1, iMessage is a tool for free information (SMS) transmission between Apple devices through the network. Generally, iMessage needs to be activated before it can be used.

2. Sending international SMS activation is one way. Some operators will charge for SMS activation, while others will not, so they have the above tips. Mobile activation of international SMS one yuan. Unicom is an agreement, so it is free, so there may be a charge.

3. If the device does not turn off the iMessage function or restore the system, iMessage can be used all the time once it is activated, otherwise it needs to be reactivated.