Hello, first time poster here, needing help from experienced andriod users. I got the Galaxy from my mother (she switched to another phone), but she lost the usb cable... I found a way of sending files via WiFi to the sdcard, and also connected adb via WiFi, but I can't flash the new recovery because I'd have no wifi connection in fastboot. Is there a way to flash an official update from the sdcard using stock recovery? I successfully entered recovery but there are no options, and I can't find a guide of any kind. I tried buying the cable, but none of the shops had the official one, so finally I bought a third party cable that only charges the phone through usb, but windows gives me some error and doesn't recognize it as a device. Thanks!