The most common accidental calls are from cellular phones and they are due to being in a pocket, bag, purse, or similar. Most phones have a safety feature built in to call 911 if buttons are held long enough.
The other major issue with cellular phones are when they are given to children. Even though the phone might not have service, it’s a safety feature to have the phone always able to call 911. We call these “911 only phones” because the only number it will allow to be called is 911.
We ask for people to keep phones either protected with a cover or not left loose in bags and also batteries are removed when given to kids. Both of these things will help eliminate accidental 911 calls.