What is the system folder in the mobile phone used for?

Except for ams, I don’t know about the several folders here mentioned by the poster. Their other functions are as follows: Messaging: This is where your mobile phone’s short messages are stored, as well as some SMS connection files. The files here are the best. Do not delete them. If you delete them incorrectly, your existing text messages may not be readable. Temp: This function is equivalent to a computer folder for storing temporary files. Generally, files are found in it only when you use the mobile phone's built-in browser to surf the Internet. wap: This also has files only when you use your own browser to surf the Internet. The difference with the above is that this folder will only have files when you download the installation file, such as jar format. That is to say, when you download the installation file, it will temporarily store the file. When you complete the installation, it will Automatic deletion, please remember that the above two folders will only have the above effect if you use the browser that comes with your mobile phone. It is recommended that you still use UCWEB to access the Internet, because if you use it to download files online, it will permanently save the files you downloaded!