If my iPhone called 911 automatically but I hung up 1 second into dialing, would it still go through?

I was trying to check Medical ID and accidentally slid the Emergency SOS slider instead. Unlike the single previous time I accidentally slid it, it didn't give me a 5-second warning and time to cancel, but started dialing right away. I instinctively hit the "end" button instantly - less than 2 seconds into dialing - and am wondering if Emergency Services system would have still auto-completed. I haven't gotten a call back but I'm no longer where it went off, so I can't say I know that no officers went to check. I know to stay on the line and report it was a false dial, but I was expecting a "cancel" button once I realized what I did and hit "end call" instinctively in its place before I could think of this. Also, I don't have a SIM card at the moment, so I'm not sure if the call back would go through the 911 transponder or try the phone's normal call system. I'm worried they might think there's an emergency or that I'm trying to play a dumb prank. (Bit of a design flaw on Apple's part, removing the countdown. Auto-call is off, so that's not why it did this.)

Called the police department non-emergency number, and reported that it tried to dial. They said they didn't get any hang-up calls, but it's still a good idea to check. I guess rule of thumb is that if you instantly hang up, it probably won't go through -- but call non-emergency and check because it's important they know as soon as possible. I do know a few things about Emergency Services systems and if you let it go for even a few seconds, it will auto-report even after hanging up, I just wasn't sure about the threshold.

Not really I don't think. Since it isn't a mobile phone I don't think it's be that quick to get r

Rnaybe you should call thern back and tell thern you dialed it by rnistake

Only time you worry, is when they pick up on the other end, and ask what your emergency is, then hang up. If it is a valid number, they call back, to confirm that there's no emergency. 911, 800, and certain phone system, know what number is calling, even if your block the call. They even know if the numbers r is cellular, VoIP or copper landline, at least as far as the last time the number was ported. So in the case of pranks, crimes, threats, rooting out who actually the number belongs to, is not a hard thing to find out.

So if the call was still dialing, and your hung up, no problem.