[Windows Central Question]

We have a group text thread that includes about 10 iPhones. I cannot add my son's Microsoft phone. I get this error: "‪+1 (000) 000-0000‬ is not registered with iMessage." How do I configure so he can be added to this thread? Thanks.

[ommoran]

You cannot I don't believe. iPhones are their own evil ecosystem.

[Laura Knotek]

iMessage only works on iOS devices. You'll need to use regular SMS for people who have Windows Phones or Androids.

[unfriendlymoose]

It sounds like your phone is using iMessage for group messages ( certain carriers put a limit on the amount of users that can be added to a group mms/sms). Your best bet would be to use GroupMe which supports every platform including users without the app.