Community Forum
If your iPhone had been locked by your previous carrier and now unlocked a restore is recommended.
i did activation along with comcast tech support step by step - without icloud and then restore. works okay.
Brought over 2 IPhone 8's 2 weeks ago from ATT. Just popped in XM SIM card and activated. Did not restore. I did back up both phones just in case something went wrong. All went smooth.