i Message includes features that allow you to start a message thread on one device and continue that message on another device using the same Apple ID.
We'll answer several questions here each week, and of course, you can always get help with more immediate concerns from the i Lounge Discussion Forums.
Install an i OS update and your device gets stuck in a continuous restart loop?
Putting the device into recovery mode can resolve your problem!
Need to update i OS or restore the device from backup but i Tunes does not recognize your i Phone, i Pad, or i Pod?
i Tunes could not backup or restore because i Phone disconnected?