How To Guide (Updated 5/21/23) How to enable N77 C-Band with 5G UW icon on OnePlus 9/9 Pro 5G (LE2115/LE2125) | Oxygen OS 11-13.1 with Custom ROM support | Verizon

[rmendez011]

How to enable N77/N78 5G on the LE2115/LE2125 OnePlus 9/9 Pro running Oxygen OS 11-13.1​

Before we start, keep in mind the following:
Your warranty is now void. I am not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed. Please do some research if you have any concerns about this modification before applying it! YOU are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you.

Keep in mind:
This can dramatically affect your battery life whenever on 5G data, as this an unofficial mod, the phone will be constantly connected to 5G UW (without the 5G UW logo of course) in N77 areas, I have no idea how to solve this (other than turning off 5G until you want SPEEEEEED). Smart 5G does not seem to have an effect on this.

Update 5/8/23:
Thanks to @itsnebulalol, they have been able to enable N77 on custom ROMs on OnePlus 9 and 9 Pro, for anyone with a OnePlus 9/9 Pro running a custom ROM, you can follow their guide here, on Github.

Update 2/21/23:
On Oxygen OS 13 F.20/F.21 (maybe older) if you get a new SIM card from Verizon (cannot confirm about other carriers) post N77 launch, you will get a 5G UW icon in your status bar, thanks to @caseyr7 for pointing this out. (Sorry about the slow SpeedTest).

You will need these two items:​

QPST, download it from here.
ADB (Obviously).

Spoiler: For Oxygen OS 12-13.1 REQUIRES Root

Since OnePlus officially enabled N78 in Oxygen OS 12, this is how we will be able to enable and connect to N77 on Oxygen OS 13. I myself cannot personally test if this works on Oxygen OS 12, I can only assume it does.

Great news! I have successfully enabled N77 on OnePlus 9 & 9 Pro running Oxygen OS 13 on the Verizon network! This would not have been possible without the help of @Rootk1t for showing me how to get Rndis,diag switch working, @sakun-ice, @jimmy123322, and @21prods for providing the necessary drivers needed.

Disclaimer:
Unfortunately, root is needed, so if you do not have root, do not continue reading.

If you do have root, without further ado, let's begin.

• Download the files provided below:

All necessary files: https://www.mediafire.com/file/c59zj43e7d3x1pl/Necessary+Files.zip/file

Thanks to @jimmy123322 and @21prods

• Once downloaded, open the ZIP file, head to Qualcomm Drivers, copy the "Mi5_Qualcomm_Drivers" to your desktop.

• Once on your desktop, plug in your phone to your PC, make sure USB debugging is enabled.

• Open a Terminal window and type the following code one line at a time:

adb shell
su
setprop sys.usb.config diag,diag_mdm,qdss,qdss_mdm,serial_cdev,dpl,rmnet,adb

Note:​

If you have never done "adb shell" "su" before, you will get a Superuser request on your phone, press "Grant".​

Once you have pressed Grant then do:​

setprop sys.usb.config diag,diag_mdm,qdss,qdss_mdm,serial_cdev,dpl,rmnet,adb​

Note2:​

If you get "error: device '(null)' not found" or you do not see your device when doing "adb devices" under "List of devices attached" in Terminal​

​

You have to switch from "File Transfer / Android Auto" to "Photo Transfer" under the popup when you plug in your phone to your PC .​

This is what I have to do on my personal PC, but not on other PCs for some reason, it might be the same for you.​

​

• After doing the previous command you will hear a USB disconnect and reconnect sound, do not panic, this is intended.

• Open device manager.

Under "Other devices" you will see quite a few devices with no driver, we're only going to focus on 3 of them.​

• Double click on the first "SM8350-MTP _SN:E1B16ED0" device you see, once the properties window appears, press "Update driver...".

• When the "How do you want to search for drivers?" window appears, press "Browse my computer for drivers".

• When the "Browse for drivers on your computer" tab appears, press "Let me pick from a list of available drivers on your computer".

• When the "Select your device's type from the list below:" tab appears, press the top most "Show all devices" option and press next.

• When the "Select the device driver you want to install for this hardware" press "Have Disk...".

• When the "install from disk" window appears, press browse.

• When the locate file window appears, navigate to the "Mi5_Qualcomm_Drivers" folder you extracted to your desktop earlier and open the "qcmdm.inf" file.

• When you return to the previous "Install from disk" window press Ok. Once that window closes, you should be at the previous "Select the device driver you want to install for this hardware" window, on the left side, make sure to select "Qualcomm Incorporated", on the right, scroll down until you find "Qualcomm HS-USB Android DIAG 9018" click it, and press next.

• You might get a "Update driver warning" stating that updating this driver is not recommended because Windows cannot verify compatibility, press yes.

• Once Windows successfully updates your driver, press close, keep in mind windows might restart after you do so. You will have to do the command again.

"setprop sys.usb.config diag,diag_mdm,qdss,qdss_mdm,serial_cdev,dpl,rmnet,adb".​

​

• Now do the same to the other 2 "SM8350-MTP _SN:E1B16ED0", for me, QPST only worked with the second one, it could different for you.

• Once you have done the steps above, open QPST config.

• Once QPST is open, at the top press "Start Clients" > and press "EFS Explorer", once you press EFS Explorer, a "Phone selection" window will appear, be sure to select the one that is called "LAHAINA" and has your ESN on it, AKA do not select one that says "Unknown" and "No ESN", press OK.

• Once you press ok, it will take 20-30 seconds for the EFS Explorer window to appear, once it appears, on the left side press "policyman", and on the right drag and drop "policies.xml" to the desktop.

• Open "policies.xml", and remove the following 3 lines.

• Once you have removed the 3 lines, and ONLY those 3 lines, once you have saved and closed the file, just drag it back into EFS Explorer, once that is completed, do a reboot.

• Wala! Your OnePlus 9 or 9 Pro should be able to connect to N77 as seen below.

​

By doing this mod, it completely ignores the "generic_band_restrictions.xml" file, @ale_jenior this might even allow it to connect to LTE band 28. I however cannot test this.​

Spoiler: For Oxygen OS 11 and older Root NOT required

Hopefully this tutorial helps all of those on Verizon and have a 5G UW plan.

Your warranty is now void. I am not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed. Please do some research if you have any concerns about this modification before applying it! YOU are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you.

Make sure you're on Oxygen OS 11 (11.2.10.10 preferably, as this is what I tested this on):

• Download this APK and install it.
  • Alternatively, go to this website, follow the guide, and carry on.

• Once both the apk (unless you went the alternative route) and QPST are installed, open your phone dialer and dial *#801#.

• Press Engineering Mode, if it asks you, press "just once".
  • Ignore if you went the alternative route, it should open engineering mode once you dial *#801# right away.

• Once engineering mode is open, turn on the last switch called "Rndis,diag switch" keep it on that screen and plug your phone into your PC, then open the QPSTConfig program on your computer.

​

​

• Only 1 device should show up, make sure it's selected.
  

• Press "Start Clients" in the menu bar and "EFS Explorer" in the sub menu.

• Again, only 1 device should show up, make sure it's selected, and press ok.
  

​

• On the left side click "policyman", on the right side find "generic_band_restrictions.xml" drag and drop it onto your desktop.

​

• Open it (duh lol)

​

​

• Look for the 2 lines shown in red boxes below.

• Change it exactly to how it is shown below (extra space after each 47)

​

• Once you've edited and saved the file, drag and drop it back into your "policyman" folder (make sure to not change the file name or extension, always make a backup of your original file!), congrats! It should be enabled, make sure to reboot to make sure the effects apply.

Here is a speed test I ran on my 9 Pro, and next to it, is Network Signal Guru showing it connected to N77.​

Something important to keep in note is that I have not tested this on Oxygen OS 12, if someone has enough courage to try on OOS 12 and finds a way to enable engineering mode, feel free to let others know in a reply.

I have only tested this on the North American LE2125 OnePlus 9 Pro 5G on Verizon, it should work on the North American LE2115 OnePlus 9 5G on Verizon, and maybe work on the T-Mobile LE2117/LE2127 OnePlus 9/9 Pro. Unsure if international variants have N77 and N78 disabled (I doubt they would work on Verizon anyways), only try if you're willing to risk it! Let me know in a reply if it works.

Now I don't know if you need Qualcomm Drivers, but if your phone doesn't appear in QPST, download them from here.

If you have any more questions, feel free to ask me!

I cannot confirm whether or not this works on any other OnePlus 9/ 9 Pro model, do this mod at your own risk.​

 

[Superguy]

Wonder if it would work for AT&T. I'm guessing the bands are already available though, just not provisioned on AT&T's end.

 

[Porquiplane]

Want to try this, but want to see other people's results first.

 

[gillim74]

Hopefully this tutorial helps all of those on Verizon and have a 5G UW plan.

Your warranty is now void. I am not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed. Please do some research if you have any concerns about this modification before applying it! YOU are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you.

Make sure you're on Oxygen OS 11 (11.2.10.10 preferably, as this is what I tested this on):

• Download this APK and install it.
  • Alternatively, go to this website, follow the guide, and carry on.

• Download QPST from here.

• Once both the apk (unless you went the alternative route) and QPST are installed, open your phone dialer and dial *#801#.

• Press Engineering Mode, if it asks you, press "just once".
  • Ignore if you went the alternative route, it should open engineering mode once you dial *#801# right away.

• Once engineering mode is open, turn on the last switch called "Rndis,diag switch" keep it on that screen and plug your phone into your PC, then open the QPSTConfig program on your computer.

View attachment 5583813​

​

• Only 1 device should show up, make sure it's selected.

​

View attachment 5583779​

​

​

• Press "Start Clients" in the menu bar and "EFS Explorer" in the sub menu.

View attachment 5583787​

• Again, only 1 device should show up, make sure it's selected, and press ok.

View attachment 5583789​

​

• On the left side click "policyman".

View attachment 5583791​

​

• On the right side find "generic_band_restrictions.xml" drag and drop it onto your desktop.

View attachment 5583795​

​

• Open it (duh lol)

View attachment 5583797​

​

• Look for the 2 lines shown in red boxes below.

View attachment 5583801​

• Change it exactly to how it is shown below (extra space after each 47)

View attachment 5583803​

​

• Once you've edited and saved the file, drag and drop it back into your "policyman" folder (make sure to not change the file name or extension, always make a backup of your original file!), congrats! It should be enabled, make sure to reboot to make sure the effects apply.

Here is a speed test I ran on my 9 Pro, and next to it, is Network Signal Guru showing it connected to N77.
View attachment 5583805View attachment 5583807

Something important to keep in note is that I have not tested this on Oxygen OS 12, if someone has enough courage to try on OOS 12 and finds a way to enable engineering mode, feel free to let others know in a reply.

Another thing is that this only enables N77 and N78, it does not however enable the Verizon 5G UW icon found on the 9 Pro when using mmWave. If someone knows how to enable it for N77/N78 please let me know.

View attachment 5583809
I have only tested this on the North American LE2125 OnePlus 9 Pro 5G on Verizon, it should work on the North American LE2115 OnePlus 9 5G on Verizon, and maybe work on the T-Mobile LE2117/LE2127 OnePlus 9/9 Pro. Unsure if international variants have N77 and N78 disabled (I doubt they would work on Verizon anyways), only try if you're willing to risk it! Let me know in a reply if it works.

Now I don't know if you need Qualcomm Drivers, but if your phone doesn't appear in QPST, download them from here.

If you have any more questions, feel free to ask me!

If i do this on oos and then flash a custom rom will it stick?

 

[rmendez011]

If i do this on oos and then flash a custom rom will it stick?

I doubt it, feel free to try, but if you're going custom ROM it's safe to assume the ROM maintainer already enabled it, and if they didn't I don't doubt asking them to enable it will be too difficult.

 

[rmendez011]

Wonder if it would work for AT&T. I'm guessing the bands are already available though, just not provisioned on AT&T's end.

Unfortunately it probably won't work, since AT&T whitelists IMEIs for 5G access, no OnePlus phone is whitelisted for 5G access, you can do this mod and see if someone in-store can temporarily whitelist your IMEI as an iPhone 13, might be worth a shot.

 

[Superguy]

Unfortunately it probably won't work, since AT&T whitelists IMEIs for 5G access, no OnePlus phone is whitelisted for 5G access, you can do this mod and see if someone in-store can temporarily whitelist your IMEI as an iPhone 13, might be worth a shot.

Anyone have any success with getting tech support to whitelist their phones?

 

[rmendez011]

Anyone have any success with getting tech support to whitelist their phones?

I'm on Verizon, I've only read stories of people going in store to whitelist their incompatible IMEIs as compatible phones, I'd assume it's the same for 5G access, however, there are some people on Reddit that say that they randomly started getting a 5G icon on their 8 and 9 Series OnePlus phones, maybe they're testing OnePlus phones, who knows.

 

[Porquiplane]

Edit: What about editing carrier policy xml. Is that not necessary? I did the steps, but unsure of how to check if it's good to go or active. Tried network sig guru, couldn't see where c band would be displayed and other apps were not beneficial.

 

[Superguy]

I wonder if you could enable LTE bands this way too.

 

[DarthScabrous]

Has anyone had any success with getting Engineering mode on Android 12? I had done this on Android 11, but never noticed any difference. Wanted to try it again, but resetting my phone again will be terrible, since my work uses okta verify and I'll have to grab help from helpdesk again.

 

[JWhetstone02]

I found this Magisk module for A12 for OnePlus. It allows you to do the *#*#4636#*#* code. I found that *#808# is engineering mode, but it looks a lot newer than what was on A11. Maybe this can help someone figure this out for A12.

 

[rmendez011]

Edit: What about editing carrier policy xml. Is that not necessary? I did the steps, but unsure of how to check if it's good to go or active. Tried network sig guru, couldn't see where c band would be displayed and other apps were not beneficial.

I did not edit the carrier policy.xml.

Network Signal Guru should show something like this whenever in a C-Band deployed area, you won't get 5G UW like on the 9 Pro when on mmWave.

Network Signal Guru can see your 5G NR info since it requires root, it reads the data from the modem. Other apps cannot read what band you're connected to.

 

[rmendez011]

I wonder if you could enable LTE bands this way too.

I'm sure you could, but not many LTE bands are disabled, only LTE B6, B37, and B39 are disabled, you can see them under <lte_bands> base="current">
<exclude> 6 37 39 </exclude>
feel free to enable them.

 

[rmendez011]

Has anyone had any success with getting Engineering mode on Android 12? I had done this on Android 11, but never noticed any difference. Wanted to try it again, but resetting my phone again will be terrible, since my work uses okta verify and I'll have to grab help from helpdesk again.

I got engineering mode working on Oxygen OS 12, however you could not enable "Rndis,diag switch" the option was simply missing, I tried many ADB commands but none worked, so I just downgraded back to Oxygen OS 11.2.10.10

 

[rmendez011]

I found this Magisk module for A12 for OnePlus. It allows you to do the *#*#4636#*#* code. I found that *#808# is engineering mode, but it looks a lot newer than what was on A11. Maybe this can help someone figure this out for A12.

It doesn't matter if you get Engineering mode working on Oxygen OS 12, you won't be able to switch on "Rndis,diag switch" the switch is missing.

 

[intense21]

I got engineering mode working on Oxygen OS 12, however you could not enable "Rndis,diag switch" the option was simply missing, I tried many ADB commands but none worked, so I just downgraded back to Oxygen OS 11.2.10.10

How did you down grade? Food you lose root and have start over on your apps?

 

[rmendez011]

How did you down grade? Food you lose root and have start over on your apps?

I used >MSM Tool< I backed up my internal storage to my PC, then I did a Google One backup for my settings, contacts, passwords, etc, yes, I had to start over on my apps, but didn't lose anything valuable (just had to login to every app).

 

[rmendez011]

Notice:
I did this on a U.S. OnePlus 9 Pro LE2125 running Oxygen OS 12.1 (LE2125_11_C.61)

I have not tested to see if N77 actually works after performing this mod, also, please keep in mind:
Your warranty is now void. I am not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed. Please do some research if you have any concerns about this modification before applying it! YOU are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you.

I will test to see if I get an N77 signal sometime today.

KEEP IN MIND THIS DOES NOT SURVIVE A REBOOT, OnePlus changed something going from OOS 11 to OOS 12, you will have to use QPST EFS Explorer every time you reboot to enable N77, I have no idea why.

It seems OnePlus has officially enabled N78 on the 9/9Pro, no idea why they didn't go ahead and enable N77 but oh well (maybe Verizon is unlocking N78 soon, no idea).

Good news! I have figured out a way to get QPST working on Oxygen OS 12! This means I could also enable N77 on the 9 and 9 Pro running on the Verizon network! This would not have been possible without the help of @Rootk1t for showing me how to get Rndis,diag switch working, @sakun-ice, @jimmy123322, and @21prods for providing the necessary drivers needed.

Disclaimer:
Unfortunately, root is needed, so if you do not have root, do not continue reading.

If you do have root, without further ado, let's begin.

• Download the files provided below:

All necessary files: https://www.mediafire.com/file/c59zj43e7d3x1pl/Necessary+Files.zip/file

Thanks to @jimmy123322 and @21prods

• Once downloaded, open the ZIP file, head to Qualcomm Drivers, copy the "Mi5_Qualcomm_Drivers" to your desktop.

• Once on your desktop, plug in your phone to your PC, make sure USB debugging is enabled.

• Open a Terminal window and type the following code one line at a time:

adb shell
su
setprop sys.usb.config diag,diag_mdm,qdss,qdss_mdm,serial_cdev,dpl,rmnet,adb

Note:
If you have never done "adb shell" "su" before, you will get a Superuser request on your phone, press "Grant".

• Once you have pressed Grant then do:

setprop sys.usb.config diag,diag_mdm,qdss,qdss_mdm,serial_cdev,dpl,rmnet,adb​

• After doing the previous command you will hear a USB disconnect and reconnect sound, do not panic, this is intended.

• Open device manager.

Under "Other devices" you will see quite a few devices with no driver, we're only going to focus on 1 of them.​

​

• Double click on the first "SM8350-MTP _SN:E1B16ED0" device you see, once the properties window appears, press "Update driver...".

• When the "How do you want to search for drivers?" window appears, press "Browse my computer for drivers".

• When the "Browse for drivers on your computer" tab appears, press "Let me pick from a list of available drivers on your computer".

• When the "Select your device's type from the list below:" tab appears, press the top most "Show all devices" option and press next.

• When the "Select the device driver you want to install for this hardware" press "Have Disk...".

• When the "install from disk" window appears, press browse.

• When the locate file window appears, navigate to the "Mi5_Qualcomm_Drivers" folder you extracted to your desktop earlier and open the "qcmdm.inf" file.

• When you return to the previous "Install from disk" window press Ok. Once that window closes, you should be at the previous "Select the device driver you want to install for this hardware" window, on the left side, make sure to select "Qualcomm Incorporated", on the right, scroll down until you find "Qualcomm HS-USB Android DIAG 9018" click it, and press next.

• You might get a "Update driver warning" stating that updating this driver is not recommended because Windows cannot verify compatibilty, press yes.

• Once Windows successfully updated your driver, press close, keep in mind windows might restart after you do so. You will have to the

"setprop sys.usb.config diag,diag_mdm,qdss,qdss_mdm,serial_cdev,dpl,rmnet,adb" command again.​

• Once you have done the steps above, enabling N77 is somewhat similar to before, but I will repeat the steps again, start with opening QPST.

• Once QPST is open, at the top press "Start Clients" > and press "EFS Explorer"

• Once you press EFS Explorer, a Phone selection window will appear, select your phone and press OK.

• Once you press ok, it will take 20-30 seconds for the EFS Explorer window to appear, once it appears, on the left side press "policyman", and on the right drag and drop "generic_band_restrictions.xml" to the desktop.

• Open "generic_band_restrictions.xml" and edit the follow line to remove "77".

• Once you removed "77" as shown above, save the xml, then just drag and drop the "generic_band_restrictions.xml" file into EFS Explorer and N77 should be enabled!

 

[intense21]

Thanks Going to try this tonight I have LE2125_11_C.48