My phone doesn't detect sim cards anymore, due to NVRAM files missing


I just don't know how this happened....I just fixed my "build.prop" issue myself.... I've been trying to download vcom drivers, but no luck...I have imei and sn writer, Maui meta 3G, also sn_station...but they won't work without without the vcom drivers....pls assist me..

Even mtk droid tools won't work....it says pttycmd1 device not found


Moreover can flashing a new ROM to my phone make it work