Hi all Yet another newbie attempting to create a popular app. I have a puzzling queiry (puzzling to me anyway). 1. Someone develops an app for Anroid OS and it is compatible with all versions 2. People download it and install on Android OS device 3. Some people say it dosnt work on their device Why dosnt it work? Surely if you have Android OS on your device, it should work or am I missing something? Is it a hardware issue or software issue? From what I have seen of Android OS, regardless of mobile device, it looks identical and most mobile devices are identical in features. Thanks for any information.