I would like to thank the author,
I followed steps describe here and its working flawlessly. Well done.!
Anyway, I tried the Stock Rom link you provided and they all show access denied, but I search and get the V30B from this link.
" h t t p : / / d - h . s t / z k U " (please remove "white space" then you get the correct link). Also in my case, first attemp to connect phone with SmartFlasher Tool didn't show COM PORT , but after (did exactly what suggest by the author) remove battery - then try again, it show COM PORT as expected. Press start -> wait 4:20 minutes and my phone start rebooting. After 2 more minutes all works well.
Sim OK, Signal OK, WIFI work, every thing looks perfect.!