DDKT3 app not install

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if you have an app installed in ddkt3 rom, and install the same app but different version or something like that, android asks to overwrite data, and if i press yes,
the installation bar comes and then it shows app not installed. this used to work on ddkq5 and ddkt1

what kind of app are u yrying to install

R u trying to install app on different stock rom version???

Sent from my GT-S5670 using xda premium

Hmm, i am on DDKT3 and never had this problem.

what i mean is i have ddkt3 and for eg i have an app called xyz
now xyz version 1 is installed on my phone
now if i get xyz v2, and install through apk, i get an error app not installed.

but if i uninstall xyz v1 and then install xyz v2 then it works.

y?

Hmm even i use the same FW. and have been facing the same problem. IT may be a bug in the firmware itself! most of my apps are on SD.May be this error does not occur if a app is on internal memory?

yeah i guess so
even most of my apps r on sd