Default Lost AWS and WIFI on sgh1337m

Hi guys. Today I flashed official rogers stock rom 4.2.2 to unroot my phone. However when phone reboot it. I saw that WIFI was not working. I tried every trick and tip online but nothing. One year ago I enabled AWS on my phone through a guide that was posted here. I tried the same guide but could not enable AWS. I followed each step carefully. But when my phone reboots I see no AWS working. I only have this one phone and I need it to make it work with wind mobile. PLEASE HELP ME THANKS