Pocket dialing, also known as butt calling, happens when your phone calls a number while it is in your pocket or handbag. This can be an embarrassing or frustrating occurrence, but it can also be dangerous. An accidental call to 911 for example can divert resources from emergency response, and a call to a private or work number could reveal confidential information to someone who shouldn't have heard it. The good news is that there are several precautions you can take to stop your iphone from pocket dialing.
One of the most common causes of pocket dialing is an unlocked smartphone that accidentally wakes up from sleep. To prevent this from happening, you can set your device to require a passcode or fingerprint/facial identification to unlock. This will prevent your device from being accidentally called or unlocked while it is in your pocket and prevent unauthorized people from accessing your phone's personal results.
Another common cause of pocket dialing is a feature that turns your phone on when it detects that you are picking it up or lifting it. This feature is a handy tool for when you do want to use your phone, but it can be mislead by the movement of your body and can mistake any motion as a "raise." To avoid this from occurring, you can turn off Raise to Wake in Settings.
Digital assistants like Siri or Google Assistant can also accidentally wake up your device and initiate a call or text while it is in your pocket. To disable this, you can open the Settings app and go to 'Siri & Search'. Here you can turn off the 'Listen for Hey Siri' and 'Allow Siri When Locked' toggles.