Is there a downloadable virtual home button compatible with a Sharp FX Plus with Android 2.2? My physical Home button is not working other than occasionally as a "Recent" button. Everything I try to download from Google play store, etc. gives me message app is not compatible with my device. Am currently using Android 2.2 (2.2.2?) and don't want to upgrade. At least one app was supposed to be compatible w/2.2 anyway.