Text messages going to old iPhone?
I have an phone 6, it is linked to an old iphone4 via a security app that allows me to use old iPhone as a camera when I am not home. It has no sim in it but in the last couple of days some of my incoming texts are going to the old iPhone and not the new one, it seems random. I am sitting at home and hear old iPhone chime a message has arrived but it hasn’t gone to my newer phone. I missed a very important message because of this the other day. How do I stop it and only get messages on my iphone6?
iPhone 4, iOS 10.0.3