I wanted to flash stock rom in my nokia 7 plus. while doing so I flashed B2N-339B-0-00WW-B03.full-test.zip using OST tool. But, it didn't work it showed the error "download failed". I disconnected my PC form the internet. Then the error was gone it started flashing. but, it stuck while flashing system.img in partition a. the progress bar went upto the midway and start again. I waited for almost 1 hour but, it didn't work. so, I disconnected my nokia 7 plus form my pc. then, after rebooting I saw it was stuck in a bootloop.