Joke Collection Website - Public benefit messages - How to synchronize SMS between IPHONE and IPAD?

How to synchronize SMS between IPHONE and IPAD?

1. iMessage on all devices must be logged in with an Apple ID.

2. Settings-information-sending and receiving, and ensure that the "How to contact you through iMessage" check boxes of all devices are consistent. Under normal circumstances, after new information comes in, as long as it is read on one device, there will be no reminder on the other device, but the content can be synchronized.