The mobile phone automatically generates amr files, which will appear automatically soon after being deleted. Ask the master to help solve it, 360 can't find the virus.

The AMR file automatically generated by the mobile phone is a recording file or ringtone saved by the mobile phone during the recording process, not a virus. If you want to delete files, you can delete the corresponding recorded files in your mobile phone.

AMR file is the most widely used voice standard in mobile communication system. MMS also uses this format as a sound standard. The commercial name of Nokia's wb-amr ringtone has been selected by 3GPP (3rd generation partnership project) as the broadband programming language standard for GSM and 3G-WCDMA applications.

Extended data:

Principle of AMR file for mobile phone:

Due to the small capacity of AMR file, the audio size of AMR can be controlled at about 1K per second, so even the audio file with the longest time of 1 min can meet the current MMS technical specifications of China Mobile. AMR is the only format for loading voice in MMS.

However, AMR has its own advantages as a voice ringtone, which is easy to make-turn on the recording function, and the voice recorded by the operator can be used as a ringtone. Because it is a universal MMS audio file, most MMS phones that support recording function can record and play AMR ringtones. However, it should be noted that being able to record and play AMR ringtones does not necessarily mean that it can be set as an incoming ringtone.