Hi

Ive had that exact same problem. I used the pr 1.2 too and that didnt work. Ive tried for a month...then finally got the guy who i bought the phone from. he gave me a step by step guide. I too had that vanilla firmware and it stopped at 20percent. i pulled it out. the next moment it showed like those old windows 95/98 buttons with weird writing i tried uploading the pr 1.2 again. pulled out the plug. then installed the latest one. pr 1.3 and bobs your uncle. it worked. if it doesnt flash it more than once...and it'll work. im no guru. all commands i know is sudo and exit lol. but once you do sort it out the phones a dream. goodluck.