A
Android Central Question
I recently bought a lenovo tab 3 10 business. There are times when you will hear a high pitch sound (sounds like the mosquito repellant app) for about 4 secs immediately after swiping the lock screen. Its not a notification sound. Already did factory reset so there are no 3rd party apps. I noticed that this happens when the device is kinda low on memory..i think. This happens at random times, not everytime. NFC is turned off. When i use headphones, sound will be heard at headphones. Hope someone can help me. Thanks!