Hey there, @qx9r7man! Thanks for contacting us. We'll do our very best to help you out. Please send us a private message to better assist you.
We're sorry to know that you're experiencing this issue. We'll be happy to assist you. You may have done this before, but we need to double check. Have you tried powering the phone off and turning it back on?
I have just started having the invalid sim card on my J7 as well. I have restarted it multiple times. Help please.
Hey there, @JammieCole! Thanks for contacting us. Just to confirm, are you using the same SIM Card that came with the Samsung Galaxy J7? Or are you using another one from another device?
Oh, I see, @JammieCole! If that's the case, please send us a private message to better assist you. In order to do so, you just need to click on my name, then select the option that says "Send this user a private message".