When I turn on the data, the battery on my phone runs out really fast

pu1. If you want to save battery life, you can save it by turning it on only when you use the app or closing it all

2017-11-20

OK

pu2. There are a lot of push notifications, but these also consume batteries and data. It's good to turn off all the push notifications unless you have to receive Kakao Talk. In particular, advertisement push notifications

2017-11-20

OK

pu3. There are apps that consume data or batteries while running background. If you turn off the data, you can't send and receive data, so just wait. It's because I keep sending and receiving data from the moment it's

2017-11-20

OK