If there is any problem faced by any andriod users, it is the that plagues beginner it is the 'cursed' Unfortunately, (fill in app name here) has stopped error message !It appears when you're in the middle of using an app, and then forces that app to close. Annoying, right? Fortunately, there is a way to solve it. Here's how to fix Unfortunately, app has stopped errors.

Clear out the app's storage
This problem often arises with the contacts, gallery and launcher apps.The procedure to fix this is generally always the same.
First,go to Settings on your device.
Go to Applications > Application manager
Swipe left until you find the All tab.
Scroll down to the app that's causing problems and tap on it.
Here you will find the Clear data and Clear cache options.
Clear cache is the option you should start with. It will get rid of saved data that allows apps to load a little quicker when you launch them. Clearing it means the app will open a little slower, but your main problem might well be solved.

Clear data will erase all the app's data, including files, settings and accounts,so don't use this unless you have to.

http://www.infinix.club/forum/195/466671