After I used qq wallet to transfer money, I suddenly couldn't receive SMS and log in to qq. What happened?

According to your description, I suggest you:

1, there may be something wrong with your mobile phone or computer. You can restart your phone or computer.

2. There may not be enough memory to receive new information. Software can be used to clean up garbage and release memory.

3. The downloaded software may be damaged. The original software can be uninstalled, then downloaded and reinstalled.

Maybe the date or time on your mobile phone or computer is wrong. You can check the date and time to see if it is correct. If the date and time are incorrect, it will cause a network error.

5. There may be something wrong with the software server, and it only takes a while to recover.