Root root causing app download error(signature not signed)

[cyaiphone]

I tried downloading the new update for facebook and when it tries to install it tells me signature not signed or certificate not signed. Could it be the black them that Kings Unleashed R3 uses? anyone know how to fix this?

 

[evomattnc]

I tried downloading the new update for facebook and when it tries to install it tells me signature not signed or certificate not signed. Could it be the black them that Kings Unleashed R3 uses? anyone know how to fix this?

It's not root...it just can't be side loaded over your current themed fb. Remove your current fb and try again or push the one you want to system apps. Move or change the fb in there to a diff name like fb.bak, and paste in your new one and change permissions

 

[evomattnc]

Why do you need the update? Fb hasn't changed that much...

 

[akazabam]

Evomattnc is right. Basically, if you have a modified app, it's going to have a different signature than the app provided by the developer. As such, you can't just install over the app. It's designed like that so that you don't end up with a hacked app. Naturally, you're using a different one on purpose, but you'd have to uninstall the existing one first. If it exists in /system/app, it can normally be upgraded by installing a new version to /data/app, and using it over the /system/app one. Naturally, the same signature rules still apply. You have to fully uninstall the existing one, whether it be in /data/app (normal uninstall) or in /system/app (by renaming it, just to be safe).