Usb port issues.

My question to you would be does this happen in any other usb port , like at home or car etc.....if not grab someone's else's cell and plug theirs up and see if the same issue happens, if it doesnt.....you have a cell phone issue........hope this helps

.....also are you plugging up your cell phone before or after you start your slingshot......

following

......that's the norm on alot of forums , people post their question for help with an issue than never post back what the solution was , so that others will be aware in the future......