[Solved] No more connection to GSM mobile network on LS997

[HTCZ715E]

Hello!
I have Sprint Lg V20 outside US, (unlocked?).
Suddenly, I discovered, that images are not sending in Fb Messanger or Viber. Only on WiFi.
So I tried to switch network types in menu(global/Hspa etc.).
After that I lost connection! And menu 'Mobile networks' is grey. But phone can receive SMS Messages. No in/out call or SMS out.
''No Sim card, or sim card error''
But I checked & Sim card is good.
How can I fix this problem?
Is there way to get back menu? Or some reset for network?
'Network settings Reset' has only WiFi & Bluetooth, did reset but not helped.
Also, in 'about phone/Network' my mobile network name is written, -120 dBm 99 asu, LTE, in service

[Solved]
So cause of lost GSM connection & Mobile Network menu - was switching to GLOBAL/CDMA mode.
In hidden menu "FIELD TEST > NAO TEST > NAOT > NAO SETTING > NAO CARRIER" set to SPR
after this go to FIELD TEST > MODEM SETTINGS > RAT SELECTION & choose "GSM / WCDMA LTE auto"
Now GSM connection should be back & "SETTINGS menu > CONNETCTIVITY > MORE > MOBILE NETWORKS" is back!
Also data upload worksSSSS!!!
yep, Can't see APN settings menu. But APN can be programmed from hidden menu again;
go to "FIELD TEST > MODEM SETTINGS > PDP SETTING > APN SETTING"
Solved2
lets switch to ATT carrier!!!
and now APN settings menu will appear (after restart)
Congratulations! to all of no-helpers

 

[HTCZ715E]

Solved2

Solved2
lets switch to ATT carrier!!!
and now APN settings menu will appear (after restart)
Congratulations! to all of no-helpers

 

[datrmon]

How did u unlock your LG v20 ls997

 

[HTCZ715E]

How did u unlock your LG v20 ls997

well, I just bought it as 'third'-hand phone. So I don't know, how it is unlocked.. I have been warned, Reset can be lock phone again. ..

 

[GGJF2009]

I had that problem with Telcel Mexico, no data upload but on download no problem, to resolve that test a at&t SIM and no more peoblem

Enviado desde mi LG-LS997 mediante Tapatalk

 

[datrmon]

Hello!
I have Sprint Lg V20 outside US, (unlocked?).
Suddenly, I discovered, that images are not sending in Fb Messanger or Viber. Only on WiFi.
So I tried to switch network types in menu(global/Hspa etc.).
After that I lost connection! And menu 'Mobile networks' is grey. But phone can receive SMS Messages. No in/out call or SMS out.
''No Sim card, or sim card error''
But I checked & Sim card is good.
How can I fix this problem?
Is there way to get back menu? Or some reset for network?
'Network settings Reset' has only WiFi & Bluetooth, did reset but not helped.
Also, in 'about phone/Network' my mobile network name is written, -120 dBm 99 asu, LTE, in service

[Solved]
So cause of lost GSM connection & Mobile Network menu - was switching to GLOBAL/CDMA mode.
In hidden menu "FIELD TEST > NAO TEST > NAOT > NAO SETTING > NAO CARRIER" set to SPR
after this go to FIELD TEST > MODEM SETTINGS > RAT SELECTION & choose "GSM / WCDMA LTE auto"
Now GSM connection should be back & "SETTINGS menu > CONNETCTIVITY > MORE > MOBILE NETWORKS" is back!
Also data upload worksSSSS!!!
yep, Can't see APN settings menu. But APN can be programmed from hidden menu again;
go to "FIELD TEST > MODEM SETTINGS > PDP SETTING > APN SETTING"
Solved2
lets switch to ATT carrier!!!
and now APN settings menu will appear (after restart)
Congratulations! to all of no-helpers

Helped me. Thanks

 

[Slinkface]

Bros please help your boy

I've been using an n920v on att f forever so I naively bought the ls997 thinking I could switch the apn settings and get trucking,well this damn phone can't even do that I can find a lot of hidden network settings via activity launcher but none of them will save and I can't find the hidden menu to save my life man. It's supposedly "unlocked" from LGsimunlock. but it will not ever recognize my sim. Any suggestions??

 

[Rdikal23]

Need help!

How I get the hidden menu to perform this on my LG v20 LS997 sprint? Please, I have the same issue.

 

[ScottieRotten]

There are pound codes you can use..

##data#

##33284# brings up the FieldTrial menu ... lots of helpful info there

5689#*997#

Brings up a test service menu..

Sent from my [device_name] using XDA-Developers Legacy app

 

[hadi124]

My LG V20 wont change the network mode from GSM and wont even show the settings of network mode. There is a network status option in network settings but it's grey and wont open what should i do

 

[aboudzd]

thiiiiins

 

[Zulqarnain_Khan]

Thank you so much.!

Hello!
I have Sprint Lg V20 outside US, (unlocked?).
Suddenly, I discovered, that images are not sending in Fb Messanger or Viber. Only on WiFi.
So I tried to switch network types in menu(global/Hspa etc.).
After that I lost connection! And menu 'Mobile networks' is grey. But phone can receive SMS Messages. No in/out call or SMS out.
''No Sim card, or sim card error''
But I checked & Sim card is good.
How can I fix this problem?
Is there way to get back menu? Or some reset for network?
'Network settings Reset' has only WiFi & Bluetooth, did reset but not helped.
Also, in 'about phone/Network' my mobile network name is written, -120 dBm 99 asu, LTE, in service

[Solved]
So cause of lost GSM connection & Mobile Network menu - was switching to GLOBAL/CDMA mode.
In hidden menu "FIELD TEST > NAO TEST > NAOT > NAO SETTING > NAO CARRIER" set to SPR
after this go to FIELD TEST > MODEM SETTINGS > RAT SELECTION & choose "GSM / WCDMA LTE auto"
Now GSM connection should be back & "SETTINGS menu > CONNETCTIVITY > MORE > MOBILE NETWORKS" is back!
Also data upload worksSSSS!!!
yep, Can't see APN settings menu. But APN can be programmed from hidden menu again;
go to "FIELD TEST > MODEM SETTINGS > PDP SETTING > APN SETTING"
Solved2
lets switch to ATT carrier!!!
and now APN settings menu will appear (after restart)
Congratulations! to all of no-helpers

...

 

[Zulqarnain_Khan]

...

 

[Zulqarnain_Khan]

I made as a video here..!

 

[Andriyol]

Hello.
Why Field Test via 5689#*997# doesn't show on my LS99720a?
I have similar problem: no network connection in LTE mode, only GSM works . APN setting greyed out, cannot be changed for setting up Internet access even in GSM mode.

 

[Zulqarnain_Khan]

Hello.
Why Field Test via 5689#*997# doesn't show on my LS99720a?
I have similar problem: no network connection in LTE mode, only GSM works . APN setting greyed out, cannot be changed for setting up Internet access even in GSM mode.

At least, not in my case.!
I made a video as well, mentioned in the above reply, lets take a look might be helpful to you.!