(Charm Blue note2) The mobile phone suddenly can't make a call and can't answer the phone. When making a phone call, it shows that dialing failed.

Judging from your description, it should be caused by weak communication signal.

First, understand the process of mobile communication. When making and receiving calls, the mobile phone needs to establish contact with the base station to transmit data packets. If there is no signal at this time, the packet loss rate will be too high. Without complete data transmission, we can't establish contact, and our feeling is that we can't dial, answer or sound card.

The mobile phone signal display may be virtual, and the actual strength is not good, and the amount of short message data is small, so the short message is not blocked. Voice data is much larger than text data, so it cannot be transmitted when the signal is weak.

I suggest you try a place with a good signal. If there is no improvement, restart the phone or return to the factory. If all the above methods are useless, it may be that there is something wrong with the hardware when you finally get the after-sales inspection.

I hope it helps you.