I have yet to turn on the icloud Imessage function on my ios12 iphone. I have years worth of messages sms/imessages and i'm wondering what should ideally happen if i turn this function on? The intent and hopes are that both the sms and Imessages get uploaded to the cloud. then when i turn icloud Imessages on a new phone or current factory reset it will all repopulate including sms. Any personal observations on that from those who used the feature? Thank you much appreciated.