Never Restarting Your iPhone
Going weeks without restarting your iPhone can let small glitches pile up, especially on older iPhone models. Your iPhone and the apps you use tend to leave small bits of data in memory, which can accumulate and increase the risk of sluggish performance or odd bugs.
A quick reboot clears memory and often fixes odd Wi-Fi or Bluetooth behavior in one shot. If your phone feels laggy, apps suddenly close more than usual, or the keyboard stutters, a quick restart is the easiest first step to try.
To quickly restart your iPhone, press and hold the Side button and the Volume Up button until the Power Off slider appears. Slide it to the right and wait anywhere from five to ten seconds after your iPhone shuts off. Then, simply press and hold the side button to turn on your iPhone again.

