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I'm trying to put apps on an LG Exalt VN220, which is a flip phone that runs on a limited version of android. Whenever I try to install an apk using adb I get the following message: INSTALL_PARSE_FAILED_INCONSISTENT_CERTIFICATES. From a quick Google search I learned that this usually occurs when you try updating an app with an update that has a different certificate. This can not be the case because these apps were never installed on the phone before. When I pulled stock apps from the phone and tried to install them I got: INSTALL_PARSE_FAILED_UNEXPECTED_EXCEPTION. However when I install apps by LG that did not come on the phone they successfully install. Does anybody know if there is a way to get around this?

  • Hi and welcome! This is a rather old phone. ❧ When was the last firmware update released? Maybe it has some security vulnerabilities. Can you somehow root the phone? ❧ Why do you want to install apps on a flip phone? You could buy a different low-end phone (maybe a refurbished Moto E6 or something) for not much money. – tealhill supports Monica Dec 25 '19 at 16:52
  • How many apps and which specific apps have you tested? – Robert Dec 25 '19 at 21:01
  • I've tried WhatsApp, eReader Prestigio, Waze and a ton of other apps. It seems to be all apps that are not signed by LG. – PotatoeS Dec 25 '19 at 23:36
  • Reading responses from the folks on XDA Forum, they haven't been successful either, and looks like this is a very locked-down phone. I'm afraid there's no solution for this issue. – Andrew T. Dec 26 '19 at 0:51
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Not sure how it works with LG exactly because I don't own an LG phone. But I had similar issue with my mi phone.

Before you can install any apps using adb you need to enable developer setting allow usb debugging, and allow install via usb. LG might have some other flags too

In older version of android there was a switch - "allow install from unknown sources". Please look for these settings and do the needful.

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