If you’re listening to music or a podcast and want to change the volume without unlocking your iPhone, then you probably press the buttons on the side of your phone. While the buttons increase or decrease your volume a set amount, they could leave you choosing between a volume that is slightly too loud or a bit too quiet. But if you keep your iPhone up to date with the latest iOS releases, you can bring the volume bar back to your Lock Screen so you can control your volume more precisely without unlocking your iPhone.