I updated my Galaxy s5 SM-G900F to marshmallow 6.0.1 OTA. I went in to the upsm mode because my battery was dying and now I am stuck there! Whenever I disable, it goes into an infinite loop and it hangs. I tried many things with no despair. I have a big problem, I didn't enable developer options or usb debugging on my phone from before. Can you help me with this please?!!! I don't want to factory reset because I didn't make a backup before (and obviously I am not able to do it now!! or can I???)
PLEASE HELP ME!