My android build was working fine till last night. I don't know what happen but on device now its showing "Parse Error : There is a problem parsing the package." Its strange but true, I checked forums for the issue, I didn't change my app name anywhere, it can't be min sdk issue as I never touch that. One strange thing I noticed that earlier my file size is around 450 MB but now it's only 250 MB. Please Advice.
Please recheck your minSDK of Unity3d Settings and AndroidManifest if you're using a customized version.