hi i m using lg optimus 3d max p725 .and i had apps like 3d camera 3d converter 3d apps and games 3d galery and etc................. i went to root-system- app and copied all their apk's to my computer.and i m using 2.3.6 andr.version and i wantd to upgrade. so i installed a new cm10 rom with 4.1.2 andr.version ..but i lost all thatapps..and i wanted it back ..so i try to install the apk's which i copied from system apps folder ......but i cant install it it is saying " application not installed" but i want that apps back ..someone pls say what should i do ...i want it back..some one help me
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