iOS 5, iOS 6, and iOS 7

Go to Settings > General > About > Diagnostics & Usage and select Automatically Send or Don’t Send.

Can I run a diagnostic test on my iPhone?

Open the Phone app and tap Keypad, then type *#0*#. A diagnostic screen pops up with buttons for a variety of tests. Tap Red, Green, or Blue to test those pixel colors. Tap Receiver to check the audio, Vibration to try the vibrating feature, or Sensor to test the accelerometer and other sensors.

What does Apple diagnostics check iPhone?

Some things you can find with an iPhone diagnostics test include: The strength of your phone’s battery. The strength of the Wi-Fi signal. The speakers and audio system.

How do I run diagnostics on my iPhone 6?

Let’s dive into the neat stuff now!
Power down your iPhone or iPad.Connect your device to a charger and then immediately hold down the Volume up + Home key combination together.Keep on holding the key combination until you boot straight into the CheckerBoard Diagnostics Mode.

How do I run diagnostics with Apple support?

They had me go to Settings > Privacy > Analytics & Improvements > Start Diagnostic With Apple Support.