What is the “shaking phone” icon in my taskbar on top right?

Hi NuclearGeneral!

That means that either your iPad or iPhone is receiving a call. If you click the button, it will show you a prompt to choose whether you want to accept or decline the call.

Take Care!

Hi!

Try to factory reset your iPhone, iPad, or iPod touch - Apple Support.

If that doesn’t work either, Contact Apple for support and service - Apple Support