[Amazon Fire Phone] dini77:
Android bug is the issue; need to delete a few apps

I think I figured out one issue which can cause this problem, which is not really a Fire Phone problem but an Android problem, at least with older version of Android and its Fire OS derivative. If you google the issue without restricting to Fire Phone, you'll see this is a common problem.

The issue is having too many apps installed -- even if you have plenty of space for them. I'm going from memory (too lazy to search again) but it seems android has a numbering system for the services within apps, but the numbering system has finite available numbers, so if you have too many apps (say, over 100 like I did), especially ones that use numerous services (and therefore numerous spots within the numbering system), then the OS can't handle that. So the solution is to delete some of your apps. Some apps will have a bigger impact than others.

So, this was the reason why one of the earlier posters said it fixed the issue when deleting "updates" to system apps. These updates are usually new installs that are used instead of the app that came with the phone which is "inactivated," so they take up spots within the numbering system just like any new install. But it actually does not matter which particular app you delete, so just delete ones you don't use.

Also, this was the reason why my Fire Phone 2, like my Fire Phone 1, went bad shortly after I booted it and did some stuff to it. That stuff was to "sync" my setup with Fire Phone 1, since I keep the two almost the same. I install almost the same apps and organize them the same way, so if a phone breaks or I don't have time to charge the battery, I can just swap in my SIM to a working phone and it is up-to-date and ready to go. Perfect backup system. But this means they were both similarly maxed out with apps, and when I added a few more to Phone 2, it developed the same issue. I believe I updated Outlook from Amazon App Store, and OneDrive from Google Play Store (I think I had installed OneDrive from Amazon store but it is no longer available there). And I added a couple of other apps in addition, like Microsoft Translator; nothing with contact links. So, not major changes.

Problem is, even if you uninstall a bunch of software, you'll still need to clear the data from Content Management Services, following the instructions in the YouTube vid posted earlier. Which is a pain if you have a lot of apps, because you have to organize them fresh.

UPDATE: My issue was not yet really fixed. While trouble shooting, I disabled Contacts Storage, and that actually prevents crashes even before deleting the excess apps. (It then seems to disappear from the list of apps but actually it is there: Need to scroll to the very bottom of the long applications list.) Re-enabling Contacts Storage brings back the crashes. But then I cleared its cash/data and force quit, and cleared just the cache (not data) in Content Management Services, and did the long press on the power button. Now it seems to be fixed.

So, it seems Contacts Storage was an important culprit.

I still love the Fire Phone but I'm stunned at how buggy Android is (or was, back in 4.4).