How should I transfer Android apps with file extensions .apk and .jar to my LG-P350 phone using data cable and install them?
Also how to get a free QR code reader and make it work on my phone?
either download apps directly from the android market, so it will make installation simple.
or download apk file to memory card.
Copy the APK file to your Android’s memory card and insert the card into your phone.
Download and install the Apps Installer application from the Android Market :http://download.cnet.com/Apps-Installer-for-Android/3000-18512_4-75210085.html
Once installed, the Apps Installer will display the APK files on the memory card. Click and install your APK files.
you can also use support tool by lg like a pc suite.