Why does the button fail when the mobile phone sends a text message?

If the keys are normal when dialing or doing other operations, there may be the following situations when the keys fail when sending short messages:

1. Dislocation of conductive sheet of mobile phone keys leads to failure of keys;

2. The key of the mobile phone is out of order due to the wrong cable arrangement;

3. The key board of the mobile phone is damaged, resulting in the failure of the keys.

The above situation can be solved by going to the mobile phone repair shop.