Phone signal crossing
Why is it that whenever my phone rings my son's phone rings simultaneously. We are both utilizing IOS 8.1.2 I believe our phones signals are crossing but I don't know why or how to correct it. I went through all of the options with regard to what numbers can be utilized to contact either of us and still the problem persists. Please advise. Any help is appreciated.
iPhone 6, iOS 8.1.2, Both phones get the same calls