Tried updating to ios 6
If you don’t see your device in i Tunes, you need to hard-reboot your i Phone to stop it from freezing.To do this, press and hold both the Sleep/Wake and Home Button together for 10 seconds or more.
Recover/Restore/Retrieve deleted/lost data including photos, contacts, text messages,call history, notes, videos in camera roll, voice memos, SMS attachments, etc. i Phone data recovery after i Phone restore/backup/update/jailbreak.Before moving onto the solutions, you need to figure out why you get the "Cannot activate your i Phone now" error after updating to i OS 11/i OS 12.1. Apple server may down due to millions of users activating their i Phone at the same time.2.The carrier you are on don't allowed you to unlock that i Phone.3. The i Phone is not recognized and cannot be activated for service.5. Below are some efficient ways to fix i OS 11/12 activation error and get your i Phone activated smoothly.1.When your i Phone reboots, it should now be selectable in i Tunes.Restore your device to factory settings and then set your i Phone up as new.