My kyocera event recently started acting up and popping up "unfortunately, system ui has stopped", "unfortunately, comandroidphone has stopped", unfortunately, launcher has stopped" and I was hoping someone knows how to fix this issue please
The reason you're getting this issue is because you may have too many apps in the background that are running.
One suggestion I can give you is to get rid of a few apps. The Event can only run so much of them, even with linking apps like Link2SD (if your phone is rooted). In my rooted phone, I run around 55 apps, including some large ones. If you're not rooted, I wouldn't allow more than 30 apps max.
For instance, I no longer use any of the social media apps. I link to them now with shortcuts that open a browser window. Facebook in particular is notorious for being a memory hog on lower end phones like the Event, especially as it requires a lot of background resources. (I've read a lot of complaints about facebook for Android, even with users of high end devices like the Nexus 7, and Samsung's Galaxy S4. Seems like the fb coders are secretly sh***ing on Android, IMNSHO! :evil: )
Another thing you could do is to use a hibernating app like Greenify. That requires rooting your phone, but it works well to hibernate apps in the background when the phone is idle. It can do more work if you get the paid version and install some 'Xposed' extensions that run in memory. That's quite a bit of work, and I haven't gone so far. The free version works well enough for me.
EDIT: Just tried yet another app.
Fast Reboot
"Simulates a reboot by closing/restarting all core and user processes and thus frees up memory. Your phone should be much snappier after using Fast Reboot.
DOES NOT ACTUALLY REBOOT YOUR PHONE, only the apps & processes. Does NOT require root."