The power button problem is one of the main problems of smartphones. Because most smartphone users used the power buttons of smartphones, in this reason this device is the worst of all. Most of the time there is no way to change the power button. But some ways of smartphones can be used without the power button. The ways are the following:
 
Using a fingerprint scanner: Nowadays all smartphones have fingerprint sensors. The fingerprint sensor works even when the smartphone is in standby mode. You can use the fingerprint sensor when the power button is bad to unlock the smartphone. But if you do not have a fingerprint sensor on your smartphone, take a look at other ways.
 
Opportunity to Gesture control: Nowadays all Android smartphones have gesture support. For example, if the double tap on the screen comes out of the phone standby mode. This gesture is to be appended to settings without power cable.  


Use third party application/Apps: You can use third-party apps if you do not have any of these features on your phone. Using different apps in the Google Play store, features like Power Button or Volume Button can be used on display. In the same way, it is possible to attach features like proximity wake up or gesture wake up using a few apps.
 
Charging time: Most of the smartphones are added to the charging cable or the display blows open. In addition to the alarm market on some smartphones, the smartphone's lock screen is open. You can try out these features.