Excuse me, the emergency telephone number already exists, but how to ask for help?

If it is correct, you should refer to the SOS emergency call function on your mobile phone. Now many kinds of mobile phones, including Huawei and Apple, support this function, and the settings and usage methods are similar. If you have set the emergency call function on your mobile phone (and turned it on), please do the following specific operations according to different mobile phone brands to start the emergency call:

Huawei: Press the power button five times in a row, and the mobile phone will automatically send help information with the current location to the emergency contact.

Xiaomi: Press the power button five times in a row, and the mobile phone will automatically send a help message to the emergency contact with location information and call records within 1 hour.

iPhone:

1.iOS 1 1 above: press the power button for 5 times continuously, and the mobile phone will automatically call the emergency contact or the alarm and emergency center, and send the current location to the emergency contact by SMS.

2.iOS 1 1: Press and hold the side key and any volume key-the "SOS emergency contact" slider appears-drag the slider-and make an emergency service call. After the call, the mobile phone will send a short message to the emergency contact.

Samsung: Press the power button three times in a row, and the mobile phone will send the real-time emergency contact, two photos taken by the front and rear cameras when they are in danger, and a 5-second recording.

OPPO: Press the power button five times in a row, and the phone will automatically make an emergency call. If the emergency contact hangs up, the mobile phone will send help information to the emergency contact, including positioning, photos taken by the front and rear cameras, 5-second recording and other information. At present, only mobile phones with R 17 and above support SOS function.

Meizu: Press the power button five times in a row, and the mobile phone will automatically call the emergency contact for help. After the phone hangs up, a help message containing the current location information will be sent to the emergency contact every five minutes.