Restore a backup to recover deleted messages.Recover deleted text messages from iPhone backups.
Why am I getting all of these pop-up notices that iMessage has been enabled on a new device? Apple just wants to be sure that if someone stole your password you are alerted.It normally takes only seconds but when Apple’s servers are overloaded (such as on an iPhone launch day) it can take hours. You do not need to stay on this screen while you wait. If you are stuck on “waiting for activation”: Try signing out of iMessage on ALL of your devices.And make sure that your phone number is enabled in Settings > Messages > Send & Receive on your other device.
If you are prompted for a code but you don’t get one then make sure your other device is awake and connected to a live internet connection. If the switch turns green you’re good to go. If you don’t get the code to connect your devices: sometimes it’s not required.If you are not prompted for a code that’s fine, sometimes it’s not necessary. Enter this 6 digit code on your iPhone to link them together. If prompted for a code, go to the device you just enabled for Text Message Forwarding and it should be displayed on the screen.It doesn’t matter which one you start with. Slide the switch on for any device you want to enable for plain text messaging.On your iPhone go to Settings > Messages > Text Message Forwarding.Your Macs must be at least 10.10 Yosemite.Your iOS devices must be at least iOS 8.1.Have an iPhone (your iPhone is used as the relay to send texts).Now that iMessage is configured across your devices you can connect regular text messaging so that you can message people on Android, Blackberry, etc. Below that, under “Start new conversations from” choose your phone number.At the very least select your phone number. In the first group “You can be reached for messages at”, I recommend selecting all the options.Click the Messages menu > Preferences.
But instead you will open the Messages app (in your Applications folder or use Spotlight or Siri to launch it).