iMessage question

[Andrew83Ga]

I gave my old ip4 to my fiance, and even though she has iMessage activated, it's not showing up when i try to text her. The send button is green etc. She's using a prepaid sim card, but I don't know why that would matter...

Any thoughts?

 

[SunnyStudioNeo]

Sometimes it takes a few more seconds for iOS to detect the other phone being an iPhone. It depends on network and server performance. In very rare cases it would simply fail and never show blue.