The meaning of each bell, iPhone vibration when plugged in

Every time you plug the charger into your iPhone, you'll hear a buzzer or buzzer if it's in silent mode. Most iPhone users do not pay attention to this cry or think that they have no meaning at all. However, in fact they are signs that your iPhone is performing a certain task.

Specifically, according to Zdnet, if you hear the bell or feel the vibrator when plugging the iPhone into the charger, it means that the device is "charging the battery" literally.

If after the first ring, exactly 3 seconds, additional bell or vibration appears, your iPhone is in "fast charging mode". Of course, iPhone 8 and newer support fast charging.

If there are 3 ringing or vibrating sounds after plugging in the charger, this means the iPhone is in USB Restricted Mode. This mode allows users to turn off USB access on iPhone, iPad or iPod Touch via the Lightning port if the iPhone has not been unlocked for at least 1 hour, helping users to be more secure from iPhone cracking and hacking attacks. .

Users can mute the vibration when the charger is plugged in silent mode if you do not want to be disturbed by, go to Settings (Settings) -> select Sounds & Haptics (Sound and Feedback) -> select pull down System Haptics -> press the switch to turn it off.