Thanks for reinforcing my point.
Indeed, the phone has a life-threatening defect and I would never own one. "Failure to dial 911" is a scary defect for a phone.
Where the title makes a logical mistake and is misleading in order to be sensational is that, assuming "dialing 911" as given context, "phone doesn't ring sometimes" is probably the least scary issue possible. In fact, it's the most common way dialing a number can go wrong. It's easy to imagine countless worse things that will radically worsen your outcomes in a life or death situation (such as: phone bricking itself, phone exploding in your hands, phone becoming subsequently unable to make any call, phone making loud noise that alerts the attacker that you are making a 911 call, so on so forth).
Perhaps for a native speaker it's not as obvious that "'very scary' issue dialing 911" here is a semantically illogical construct, but I assure you it is. Example of one that isn't: "'very scary' issue with a Pixel phone involving 911 calls".