iOS Question TCP Connection when Phone call is received & app is swapped


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If I am using a TCP socket in my app and it's connected to a device, what would happen if the user gets a call or the user double presses the home button and swaps apps and then they re-open the app again ?

I am guessing the TCP socket will disconnect since Apple doesn't allow the connections to be open in the background and I would need to re-connect the socket again when the user re-opens the app again ?