The mobile phone always misses to remind you what the situation is.

Signal instability and notification authority. Signal problem: when the cell phone signal is poor or in a weak signal area, it may not be able to answer the incoming call normally, and the operator will send a message to remind you of missing words. You can try to move to an area with good signal, or check whether the cell phone signal is normal. Notification rights: Please ensure that the relevant application has obtained the required notification rights and that the ringing of incoming calls is enabled in the system settings.