[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] nm1557:
Using this ROM on Verizon

Verizon Service Status (Latest Build): Working with Workarounds

Verizon LTE and VoLTE is working with below steps on HAVOC build v2.1. Follow each section of the post below, line by line, to get it going.

Prerequisites

Switch the sim to the correct slot (SIM1 causes issues) and make a TWRP backup (if available)

If you have a custom recovery, boot into TWRP and make a backup (in case you screw up)

Turn Phone off

Put Verizon SIM card in Sim Slot 2

Turn Phone on, depending on your ROM before Havoc v2.1, you may or may not have service. That is fine, continue to the downloads steps below.

Downloads

Download the following items to a folder on your computer. For example, I put my items in a folder named "HAVOCROM"

HAVOC 2.1 - Jan 16 Build Download (or see the original post for latest build, anything with a v2.1 or higher base should work) https://sourceforge.net/projects/ha...OS-v2.1-20190116-fajita-Official.zip/download

TWRP Installer https://eu.dl.twrp.me/fajita/twrp-installer-fajita-3.2.3-1.zip.html

TWRP Boot Image https://eu.dl.twrp.me/fajita/twrp-3.2.3-1-fajita.img.html

Magisk (Not Optional) https://github.com/topjohnwu/Magisk/releases/download/v18.0/Magisk-v18.0.zip

Magisk Manager https://github.com/topjohnwu/Magisk/releases/download/manager-v6.1.0/MagiskManager-v6.1.0.apk

Download Google Apps (PICO or NANO recommended) https://opengapps.org/

Tested Google Apps Version Download (If you're confused what to do with the link in the previous step ): https://github-production-release-a...esponse-content-type=application/octet-stream

Transfer

Connect Phone to ADB Bridge

Open the folder containing the downloads from above. I use "HAVOCROM" on my desktop

SHIFT+Right Click and select one of the following

Open Command Window Here

Open in Terminal

Run the following commands line by line

adb push Havoc-OS-v2.1-* /sdcard/
adb push twrp* /sdcard/
adb push open_gapps* /sdcard
adb push Magisk* /sdcard/
adb reboot bootloader

Wait until your phone reboots, and run the following command.

Recovery and ROM installation

fastboot boot twrp*.img

This will boot you into the recovery (you may already have one).

In your recovery, Do the following.

Run "Wipe"

Install Havoc OS

Install twrp (twrp-fajita-3.2.3...installer.zip)

Reboot into the system

Google Apps and Magisk Installation

Unlock your phone and leave it on the home screen. Run the following commands to send you back to the recovery. This initial boot process is necessary.

adb reboot recovery

In your recovery, install the following packages in this order:

open_gapps-arm64-9.0-nano-20190117.zip

Magisk-18.0.zip

Finally Reboot.

Magisk Module and Carrier Mode Set

Open Settings App

Navigate [Network & Internet] > [Mobile Network]

Click the "Advanced" Dropdown to expand the settings page

Select Preferred Network Type to Equal "LTE/GSM/TSCDMA"

Close the Settings App, Open Files

Double Click the MagiskManager-v6.1.0.apk file in your /sdcard/ path to install the Magisk Manager

Install the app, and when finished Open the Newly added Magisk Manager

Navigate to the Menu and Select Downloads

Search for VoEnabler

Click the download button on the right of the list item that matches VoEnabler to install

Upon finishing, click reboot

Upon boot, you will activate with verizon (may take a minute) and you should see a VoLTE icon. Test a call with #832 to ensure it worked!

Example With T-Mobile & Verizon dual sim