Unhappy [Q] LG-E971 weak signal

Hi everyone.

I was flash Korean Rom in my LG-E971. Really stupid - after reading some post . Now whatever I do - flashing stock rom, changing baseband, my E971 signal is very very bad - it drop very often. So is there any thing I could do to fix this problem ? I've read some few post saying that restore your EFS could fix it, but my problem - I didn't make any back up yet . So could any of you could share your E971 EFS back up file ?

Thanks for reading and really sorry for my bad English.

Happy New Lunar year everyone