LG V20 CDMA to LTE/GSM switch via Hidden Menu

[vlad48]

First of all credits go with many thanks to @hyelton for the instructions and original post for LG G5!

NOTE: starting with ZV8 firmware version Sprint has patched its ROM, so this option is not available any more.

Now short instructions on how to switch your LG V20 from CDMA to LTE network and configure your 3d party SIM APN settings:
1. Download attached HiddenMenuCall app and install it on your device.
2. Start the application and scroll down to IOT(CDG2) row and press it.
3. Next scroll to LTE settings and press it.
4. Select afterwards Operation Mode and change it from Production to Lab Network
-------
After that the phone will reboot.
-------
5. After reboot start HiddenMenuCall again and scroll down to IOT(CDG2) row and press it.
6. Next scroll to LTE settings and press it.
7. Now select APN Settings and press it.
8. From the upper right corner press 3 dotted menu and select New APN.
9. Configure your APN (refer to Biggest APN list) and press SAVE again in the 3 dot context menu.

That's all you'll now have a LTE/GSM enabled device

 

[charlie95113]

this apk has so many settings im tempted to mess withit. i see on off for voice over lte

 

[hyelton]

this apk has so many settings im tempted to mess withit. i see on off for voice over lte

VoLTE will only work with Sprint and only if they support it.


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[charlie95113]

imgoing through the menu right now i also see some roaming bands turned off im going to mess with a few option and see what happens

 

[Beefy1488]

I paid like 15 bucks for this stupid thing back in January or febuary off ebay

 

[hyelton]

I paid like 15 bucks for this stupid thing back in January or febuary off ebay

The APK? Wow... I thought it was unlocked a different way.


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[Beefy1488]

yea dude was selling it as a way to unlock the phone. It works half ass, but I ended up getting sprint to UICC unlock my phone so it was a waste of money for me. my phone is unlocked now, just got to root it so can get it to show like Verizon,or what ever service I end up using. well got to flash the rom of what ever carrier I am going to use

 

[hyelton]

yea dude was selling it as a way to unlock the phone. It works half ass, but I ended up getting sprint to UICC unlock my phone so it was a waste of money for me. my phone is unlocked now, just got to root it so can get it to show like Verizon,or what ever service I end up using. well got to flash the rom of what ever carrier I am going to use

That's terrible. Report sellers that do that.

But You can't do what your wanting to do. You can't put that phone on Verizon, it doesn't work that way. Unlocked means it will work on AT&T, T-Mobile or any other GSM carrier in the USA or outside the USA.

2. I don't think there is root for the sprint model.

3. You can't flash other carrier firmwares. You can ONLY use the firmware that's on the device. If you flash a different carriers firmware you'll brick your device..


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[gerland]

So even if I actually can uicc unlock my Sprint V20 it won't be able too be rooted???

 

[hyelton]

So even if I actually can uicc unlock my Sprint V20 it won't be able too be rooted???

If there's root available for your model yes. But if not then no. UICC unlock won't have anything to do with being able to root or not.


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[Beefy1488]

I can still root cause has not updated. already asked me2151. it will work on Verizon, had my sim card from Verizon in it and worked just fine except not showing Verizon symbol in the service corner, its a unlocked phone now, I don't think it will work on gsm cause of it being a cdma phone. I mean worst case scenario I will use on boost mobile.

 

[hyelton]

I can still root cause has not updated. already asked me2151. it will work on Verizon, had my sim card from Verizon in it and worked just fine except not showing Verizon symbol in the service corner, its a unlocked phone now, I don't think it will work on gsm cause of it being a cdma phone. I mean worst case scenario I will use on boost mobile.

Verizon doesn't officially support non Verizon devices meaning non LTE data may not work or work correctly.

It working on Verizon doesn't mean it's unlocked. Unlocking a phone relates to GSM not CDMA. Also if you use that apk your phone will work perfectly fine on AT&T or T-Mobile. Just like the Sprint G5 does.


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[Beefy1488]

I have that app plus my phone is sim unlocked, it was paid for in full so I had them uicc/sim unlock it. that is what I was trying to say idk if I misconstrued that.

 

[rubiicon59]

OK first problem I want to sort on my V20 is Tethering shutting down after 20 seconds, every single time it's switched on.
I'm in the UK and have the H990ds Taiwan variant.
When trying to change APN settings some options are not there when I compare to the settings on my Z2, and some other options that are there cannot be edited.
So this thread looked hopeful but I've installed the apk from the OP link and this is what I get when I open the app -

 

[hyelton]

OK first problem I want to sort on my V20 is Tethering shutting down after 20 seconds, every single time it's switched on.
I'm in the UK and have the H990ds Taiwan variant.
When trying to change APN settings some options are not there when I compare to the settings on my Z2, and some other options that are there cannot be edited.
So this thread looked hopeful but I've installed the apk from the OP link and this is what I get when I open the app -

This thread of for specifically making a US carrier device be network unlocked. This that most likely won't be of any use to your model.

That's a very strange issue. Settings with your APN won't make your hotspot shut off. You can turn on hotspot even if data is not working.

Seems more like a software issue or hardware issue.


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[rubiicon59]

Thanks. But so far after much googling APN settings are what everything has led me to believe is the problem. So I'm trying whatever I can.
Back to the drawing board....

 

[hyelton]

Thanks. But so far after much googling APN settings are what everything has led me to believe is the problem. So I'm trying whatever I can.
Back to the drawing board....

Have you tried performing a factory reset?


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[hkjohn]

Very interesting post. As mentioned, this App is unfortunately intended to be used in the states only. Should it be possible to help us switch the bands for different carriers in different countries, would it be great!

 

[rubiicon59]

@hyelton
The problem was down to a Sony app that I inadvertently installed when setting up my V20.
Thanks for your help.

 

[jaysonic88]

First of all credits go with many thanks to @hyelton for the instructions and original post for LG G5!

Now short instructions on how to switch your LG V20 from CDMA to LTE network and configure your 3d party SIM APN settings:
1. Download attached HiddenMenuCall app and install it on your device.
2. Start the application and scroll down to IOT(CDG2) row and press it.
3. Next scroll to LTE settings and press it.
4. Select afterwards Operation Mode and change it from Production to Lab Network
-------
After that the phone will reboot.
-------
5. After reboot start HiddenMenuCall again and scroll down to IOT(CDG2) row and press it.
6. Next scroll to LTE settings and press it.
7. Now select APN Settings and press it.
8. From the upper right corner press 3 dotted menu and select New APN.
9. Configure your APN (refer to Biggest APN list) and press SAVE again in the 3 dot context menu.

That's all you'll now have a LTE/GSM enabled device

I don't see the IOT (CDG2) menu when i open the hidden menu on my H918. Does this apply to T-Mob?