I need to use my phone to take credit card payments. I'm considering Square Up and Go Payment (by Intuit). The Square Up website says you can't swipe cards on the Droid X using Android OS 2.3.4 -- you have to enter the info manually. The service charge is much higher for manually entered transactions vs. swiped ones. Does anyone have experience with either Square Up or Go Payment, or have a suggestion for working around the conflict with OS2.3.4? I'm not sure how to install a previous OS, or if that is something I even want to do. Any suggestions appreciated.