1. Checking Wi-Fi or Cellular Network Connectivity
a) Open any application that requires a network connection (Internet, Chrome, Weather apps, etc). For this example, we will use Google Chrome. A home page should immediately load. If it does not, navigate to any website such as CNN.com, ESPN.com, etc.
b) If the page successfully loads, then you are connected to a Wi-Fi or cellular data network. If it does not successfully loads, or loads very slowly, your connection may be the problem
2. Clear all running applications
a) If there are too many applications currently running on your device, it's possible that the device's attention is being divided in too many ways and is causing this crash. Restarting the device is something that should be done regularly. There's a finite amount of virtual memory the device has available before it starts to see a performance decrease.
b) To stop currently running applications on your android device, press the app manager button at the bottom right hand corner of the screen. You'll be able to see all of your currently running apps, with them most recently used at the bottom; swipe the apps you'd like to close (particularly the iUNFI app) either to the right or to the left to stop the app from running in the background.