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How To Guide - How to enable N77 and N78 C-Band on OnePlus 9 and OnePlus 9 Pro r...

 2 years ago
source link: https://forum.xda-developers.com/t/how-to-enable-n77-and-n78-c-band-on-oneplus-9-and-oneplus-9-pro-running-oxygen-os-11-verizon-users.4429489/#post-87151819
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How to enable N77 and N78 C-Band on OnePlus 9 and OnePlus 9 Pro running Oxygen OS 11 (Verizon users)

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.
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  • Only 1 device should show up, make sure it's selected.
QPSTConfig_kIvg9mNXd6.jpg
  • Press "Start Clients" in the menu bar and "EFS Explorer" in the sub menu.
QPSTConfig_TFwK2DUhdp.jpg
  • Again, only 1 device should show up, make sure it's selected, and press ok.
EFSExplorer_PtLfwFTrOD.jpg
  • On the left side click "policyman".
EFSExplorer_X0pFEx1ihT.jpg
  • On the right side find "generic_band_restrictions.xml" drag and drop it onto your desktop.
EFSExplorer_3AiZOXsDuF.jpg
  • Open it (duh lol)
  • Look for the 2 lines shown in red boxes below.
EFSExplorer_f3EYw7Y5dr.jpg
  • Change it exactly to how it is shown below (extra space after each 47)
EFSExplorer_UlfrUNNZZw.jpg
  • 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.
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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.
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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!

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