Develop Bugs

LG G3 F400K WiFi Wont turn on - its Greyed out!

Hi All
My Korean F400K LG G3 has been working fine for months until recently when WiFi started playing up - wouldnt connect etc.
I have done a reflash to original factory (F400K10g) using LG Flash program and now wifi is greyed out and not selectable at all...
I have reflashed 3 times but still no wifi - any suggestions
Phone not so useful without WiFi connection
Thanks
Frosty

Anyone have any suggestions?
Or does this sound like a hardware problem?

wifi not turning on, and sim card not being detected.

Suddenly today, wifi is not turning on, or turns on and not find networks, and sometimes suddenly it connects to the router, and i get notification but once i launch an application, the wifi disconnects.
for the Sim-card it was working today, until suddenly stopped working too....
Any help? software wise? if not do u suggest any average priced good phone ? can't really pay high priced phones $400+.
I will not buy LG anymore ever.
Thanks.
LG G3 D851 !
EDIT: I TRIED FULMICS now stock rom ! and simcard WORKED ! but wifi is not stable, come and go....
IS it the issue with nougat roms ?? so far i tried : RR and GRound zero tesla nougat roms and both gave issues with wifi and simcard !!

my wifi and sim service stoped working

I have my op5t for more then 2 years now with no problems.
today I woke up and discovered I can't turn wifi on and the device stoped ditecting my sim card.
somtimes the wifif and the sim service turen on for a feue sec and turn off again.
I've already tried wipe everything and flash the last OS version with no succes. what should I do?

Hello,
Can't help you, but I have the same problem and it seems to have occurred in a similar time - also a few days ago. Suddenly my SIMs stopped being detected overnight and then after a few restarts wifi stopped working too.
Also, the SIM cards work fine when inserted to another phone.
Any ideas?

Lm-g710ulm wifi and Sim issues

Hi there recently got an LG G7 LM G710uLm and the wifi keeps dropping. It connects to the wifi for about seconds then disconnects. but when i remove the sim card i works perfectly is there a fix for this? thank you
I have tired 2 sim cards and still the same issue. Wifi only stays connected when I take out the sim

Lg g7 wifi keeps disconnecting as long their is a sim card inserted into the phone

My phone wifi won't stay on long as their is a sim card in the phone. The wifi will keep connecting and disconnecting.. Have anyone else had this issue