The reason why the application is forced to shut down while using a cell phone

pu1. There is an error in the application, but there are times when the application development company doesn't support old phones. There are so many types of phones that it's hard to apply for all of them. Because of that, the test for old phones didn't go well, so there could be a bug

2017-12-11

OK

pu2. I think only apps that keep bouncing will keep bouncing, but that happens because there's a bug in that application

2017-12-11

OK

pu3. It's because there's a bug in the app

2017-12-11

OK