I have text forwarding setup on multiple Macs,iPads and iPhones, with a XS being the phone with a SIM, but I have a iPhone 7 that refuses to send SMS. iMessage works fine and I can sync SMS but when I send one it fails. I have restored it twice and tried signing in and out but to no avail. During one sign in I got an error that said the iCloud account and the phone account were different but I'm using the same Apple ID as always and the phone was iCloud unlocked when I got it. I use it as a iPod touch of sorts and its annoying I can't send SMS from it. I don't what else to try.