I made a boo boo and flashed stock B13 Chinese to my A2017U via EDL and can't get a cell signal at all.
I've tried using a stock A2017U EDL file to get it back to the american 2017u with no luck, keep getting errors.
Look up your model number on www.sammobile.com under firmware and that should help you reinstall your OS, or find a flashable zip and install from TWRP.
Re: is the usb port cover under warranty on samsung galaxy 5?
I had to send one in for camera problems and they replaced that cover on mine for free. You can buy those on ebay too, around $6