How to *completely* uninstall an Android app?

StewartR

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Stewart
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I'd really appreciate some help from anybody who has a better understanding the guts of Android than I do. I'll explain the background and the context, but I don't think they're critical to my problem.

I'm trying to set up an app that will allow me to access my business's VOIP phone system from my mobile. The providers of the VOIP system have recommended a softphone app, and provided instructions on how to configure it. So far so good.

When I first tried it, it didn't work properly. It partially worked, but some functionality was broken. That wasn't entirely surprising because the VOIP providers had rushed to get this service ready, and perhaps it hadn't been fully tested. No worries. I reported the problems, and a while later they advised me that they had fixed them. But I tried again and it still didn't work.

Here's where it gets interesting. I wondered whether there might be something wrong with the configuration of the app on my phone, and maybe reinstalling and reconfiguring it might work. So I uninstalled, rebooted, and reinstalled. BUT - the app didn't go into the configuration process. It decided it didn't need to. Somehow it already "knew" my account ID, proxy server, and all the other configuration details.

So here's my question. It seems that the app left some data behind, after I uninstalled it. But where is that data? If it were a PC I'd look in the Windows Registry. Where should I look on an Android device?
 
When it's installed, have you tried deleting cache and data from settings->app name->storage->clear storage / clear cache ?
 
When it's installed, have you tried deleting cache and data from settings->app name->storage->clear storage / clear cache ?
Aha! No, I hadn't tried that. So I did, and it returned the app to its unconfigured state. Which was exactly what I wanted. Thanks.

(It didn't solve my problem with the app not working. But at least I've been able to prove that it's not a configuration problem left over from when it was first installed, so that's progress.)
 
Aha! No, I hadn't tried that. So I did, and it returned the app to its unconfigured state. Which was exactly what I wanted. Thanks.

(It didn't solve my problem with the app not working. But at least I've been able to prove that it's not a configuration problem left over from when it was first installed, so that's progress.)

With computers eliminating possibilities of what's wrong is a step forward :)
 
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