Urgent! ! ! Nokia's mobile phone received a text message without prompt tone.

I also used this mobile phone and met a comrade, haha.

It may be a software problem. You can take out the memory card first and use it for a while to see if there is still this problem. If there is no problem, you can confirm that it is a software problem on the memory card.

Install the memory card, and the software inside can continue to be used. Check which software has problems one by one.

Backup software is actually very simple. There are many forums and special software posts on the Internet. There is a lot of software in it, almost all of which are in use. Check it inside and download and install it again.