Mobile Networks greyed out, cannot make or receive calls

[et wu]

Hi All,
I am a newbie and this is my first post, please excuse me if I post this in wrong section.
I owned a G4 nearly a year. Recently, I carried a smart cleaning and since then I lost networks connections. The Mobile networks was grey out and I could not made/receive calls although every other functions work perfectly The networks not available notice shown on screen.
Steps taken so far :
>swapped sim cards - no fix
>Written to LG service who suggested a Hard reset, did the hard reset - no fix
>looked into Setting/"status" and discovered the IMEI/IMEI SV numbers were wiped out (unknown).
I have no clue what to do next. I need help from you experts to get my phone back in order. Any suggestions will be greatly appreciated.
etwu
PS: I am sure if I can get the IMEI number re-entered into the phone, networks connection will be restored. But how ?

 

[et wu]

I found a way to restore IMEI number to my phone and restore networks connection. I like to share it with anyone who experiences the same problem.
>Turn off the phone
>Remove sim card from phone
>Turn phone back on
>Dial *#06# and press call button
>imei number will show on screen
>check setting/status to confirm imei number
>restart the phone with sim card insert to confirm networks connectivity
Problem solved.
etwu.

 

[rckymtntim]

Thanks for the info. Glad you were able to work in out.

 

[et wu]

something weir going on with my G4. After fixing the IMEI number and regained my network connection. it was going fine for a few days. Then it happened again. I tried the same trick and regain network connection.
The only thing I did was to allow the phone battery to run down to a point where it shuts down.
Any feedback greatly appreciated.