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I'm facing trouble installing a modded .apk if the same app is already provided in stock Rom.

I'm using Micromax canvas E481, not rooted yet. Which has saavn app already installed. I uninstalled it to install a mod version of saavn. But I'm getting error "app not installed" however same apk is working on my other devices. Same is happening for playstore.apk.

Saavn is not a system app, it's just provided in ROM by Micromax. From application, it gives option to uninstall it. I can install apk for any version of Saavn, it's just not letting install the mod version. If I modify it using lucy patcher it won't install it but it will let me install the original apk for any version bypassing the pop up from es Explorer.

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  • Use logcat and attempt to install the apk using adb install. You would be able to see what's causing the problem. – Firelord♦ Jan 18 '16 at 12:20
  • Already tried, it says app not installed. Its happening only if I'm trying to install same app which is already in stock (uinstalling isn't making any difference) – Akkitech Jan 18 '16 at 12:23
  • "app not installed" is shown by Package installer app. What do you see in logcat's output and when attempting to install using adb? – Firelord♦ Jan 18 '16 at 12:25
  • can you tell me command only for instalation part? it prints a lot... – Akkitech Jan 18 '16 at 13:00
  • Use this to get an idea of filtering: forum.xda-developers.com/showthread.php?t=1726238 – Firelord♦ Jan 18 '16 at 13:02
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INSTALL_FAILED_UPDATE_INCOMPATIBLE should tell you something. "app is already provided in stock Rom", "not rooted" and "I uninstalled it" don't match: w/o root, you cannot have uninstalled a system app (you probably have disabled it).

Same goes for Playstore: you cannot simply "update" it with a patched version. If it's an official version (signed by Google), you could update it – but then you must tell adb install you want to update: adb install -r xx.apk (note the -r, which stands for "re-install"). Not sure whether that works via adb for pre-installed apps, though (I've never tried).

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  • Ok, for saavn i completely uninstalled it. To make sure it's not installed, I checked the package name and app name everywhere (even in root folder) but not found. Eventually I tried installing it using Es Explorer, and you know what.... The pop up says... Installed ver 4.3, new version 4.5. Where on earth is it installed in my mobile? – Akkitech Jan 18 '16 at 14:09
  • So i first did it the natural way. Uninstalled it from my phone. It didn't work out. I then installed one from playstore and uninstall is from desktop using a software and it didn't work out. Then I uninstalled it using 'adb uninstall' and it didn't workout either..... So not sure what should I try now..... – Akkitech Jan 18 '16 at 14:31
  • @Akkitech again, without root you cannot uninstall a system app (which is why "adb uninstall didn't work either"). As Firelord asked, please detail how you "uninstalled" it initially. I doubt you succeeded. – Izzy♦ Jan 18 '16 at 14:38
  • It's not a system app, its just provided in rom by Micromax. From application, it gives option to uninstall it. Let me rephrase.... I can install apk for any version of saavn... Its just not letting install the mod version. If i modify it using lucy patcher it won't install it but it will let me install the original apk for any version bypassing the pop up from es Explorer – Akkitech Jan 18 '16 at 14:44
  • @Akkitech that sounds a bit contradicting: Everything "inside the ROM" is a system app. And sure you can install any official version (the app signature matches then, so this works even for system apps). But as soon as you patch them (e.g. using Lucky Patcher), the signature is broken (and usually a different one applied) and no longer matches, so the system will refuse accepting it as long as the original app is still there. As for Saavn I'm confused what that uninstall option inside the app is supposed to do. – Izzy♦ Jan 18 '16 at 14:51

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