I have a question for everyone. I have the IPhone 7 plus on T-Mobile and I am loving the phone. The problem I am having will happen frequently and then the polar opposite. What will happen is when I am in pandora, Pokémon go, YouTube, and other apps. I will be using them, and of all of a sudden I will get a black screen with the loading symbol apple uses. I have replaced the phone once already. Hasn't fixed the problem. Has anyone else been dealing with this? Thank you in advance for all the help.