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ONEPLUS 6 LINEAGEOS 22.2 GOOGLE LOGIN ISSUE

Resolving the Persistent OnePlus 6 LineageOS 22.2 Google Login Issue and Play Integrity Errors

Navigating the complex landscape of custom Android ROMs often requires a deep understanding of the interplay between device firmware, Google services, and root-based system modifications. For users of the OnePlus 6 (codenamed enchilada) who have transitioned to LineageOS 22.2 based on Android 15, a particularly frustrating roadblock can manifest during the initial device setup. We have analyzed a widespread and persistent issue involving Google account login failures, Factory Reset Protection (FRP) lockouts, Play Integrity NETWORK_ERROR codes, and subsequent APK installation problems. This comprehensive guide provides an in-depth technical breakdown and a step-by-step resolution strategy to permanently resolve these interconnected anomalies.

Understanding the Core Conflict: FRP, Play Integrity, and Custom ROMs

The root of the problem lies in a conflict between the device’s low-level firmware state and the expectations of Google’s SafetyNet and Play Integrity APIs. When you perform a factory reset on a device with an unlocked bootloader running a custom ROM like LineageOS, several security checks are triggered.

Factory Reset Protection (FRP) and the Locked State

Factory Reset Protection is a security feature designed to prevent unauthorized use of a device after it has been lost or stolen. It is tied to the Google Account previously logged into the device. When you factory reset a phone, FRP remains active. Upon rebooting into a new ROM, the setup wizard will query the device’s persistent memory for the last logged-in Google account. If the device cannot verify this account due to the environment change (from OxygenOS to LineageOS), or if the underlying attestation service is failing, you are locked out. The device expects to contact Google servers to verify the account, but the custom environment often fails these checks, creating a vicious cycle.

Play Integrity and the NETWORK_ERROR Code

The NETWORK_ERROR (often error code 7) reported by YASNAC (Yet Another SafetyNet Attestation Checker) is a critical symptom. This is not merely a Wi-Fi connectivity issue. It signifies that the Play Integrity API, which apps use to determine if your device environment is “certified,” is failing to connect to Google’s attestation servers. In the context of a custom ROM with root access (Magisk), this error almost always points to a failed bypass of hardware-backed attestation. The device is essentially telling Google, “This ROM is not official, and I cannot prove its integrity.” This failure prevents Google Play Services from initializing correctly during setup, which in turn causes the FRP loop.

The “App Not Installed” Error via Sideloading

A secondary but related issue is the inability to install APK files directly on the device, requiring the use of ADB (Android Debug Bridge) for every installation. This typically occurs when the signature verification mechanism of the Android Package Installer is compromised. This can be caused by incomplete GApps flashes, conflicting Magisk modules, or file system corruption resulting from multiple dirty flashes of the ROM without wiping necessary partitions. The system rejects the APK because it cannot properly verify its cryptographic signature, often misinterpreting it as a system app attempting to be overwritten or a corrupted file.

Primary Solution: The Firmware Reset and Clean Flash Protocol

The most effective method to resolve this multi-faceted issue involves a complete reset of the device’s firmware state to a known good baseline. Reverting to OxygenOS to remove FRP is a valid step, but we must ensure the transition back to LineageOS is performed with surgical precision to avoid reintroducing the conflict.

Prerequisites and Required Files

Before beginning, ensure you have the following files downloaded and stored on your computer:

  1. Latest OxygenOS Firmware for OnePlus 6: You need the full ROM zip to ensure all partitions are restored to stock.
  2. Latest LineageOS 22.2 Build for enchilada: Always download the newest build from the official LineageOS downloads page.
  3. Corresponding Mindthegapps for Android 15: Ensure the version matches the LineageOS build date.
  4. Latest Magisk Installer (APK renamed to ZIP): Essential for root access and future module management.

Step 1: Returning to a Stock OxygenOS State to Clear FRP

The goal here is to completely remove the custom ROM environment and restore the stock Trusted Execution Environment (TEE) and attestation keys.

  1. Unlock the Bootloader (If Re-locked): If you re-locked the bootloader after returning to OxygenOS previously, you must unlock it again. This will wipe the device.
  2. Flash OxygenOS: Use fastboot commands or a local upgrade via the System Update menu in OxygenOS recovery to install the full stock ROM.
  3. Initial Setup and Account Removal: Once OxygenOS boots, go through the setup process. Connect to Wi-Fi and log in to your Google Account as normal. This re-establishes the device’s certification with Google servers in a clean environment.
  4. Perform a Factory Reset (Within OxygenOS): This is the crucial step to clear the FRP lock. Go to Settings > System > Reset options > Erase all data (factory reset).
  5. Do NOT log in again: After the reset, stop at the first setup screen. We do not want to register a Google account again before flashing LineageOS. The goal is to leave the device in a “clean” state where FRP is not triggered.

Step 2: Preparing the Device for LineageOS

With the device in a clean state, we must prepare the partitions for the custom ROM.

  1. Re-enter Fastboot Mode: Power off the device, then hold Power + Volume Up until the fastboot logo appears.
  2. Wipe Partitions: Execute the following commands via ADB on your computer to ensure no remnants of OxygenOS remain that could cause conflicts.
    fastboot wipe userdata
fastboot wipe cache
fastboot erase metadata
fastboot erase misc
  3. Flash LineageOS Recovery: Extract the LineageOS zip and flash the recovery image.
    fastboot flash recovery recovery.img

Step 3: The Clean Installation of LineageOS 22.2

Reboot into the newly flashed LineageOS Recovery.

  1. Format Data: Select “Format Data / Factory Reset” in the recovery. This encrypts the data partition correctly for LineageOS. Warning: This will wipe all internal storage.
  2. Sideload the ROM: Go back to the main menu, select “Apply Update,” then “Apply from ADB.” On your computer, run:
    adb sideload lineage-22.2-xxxxxxxx-UNOFFICIAL-enchilada.zip
  3. Sideload Mindthegapps: Without rebooting the system, immediately sideload the GApps package in the same manner.
    adb sideload MindTheGapps-15.0.0-arm64-xxxxxxxx.zip
  4. Reboot System: Now, reboot the system. The first boot will take several minutes as it sets up the new environment and optimizes apps.

Configuring Magisk and Play Integrity Fix (Next)

Once LineageOS 22.2 is running, you will likely encounter the Google login issue again if you immediately try to sign in. To fix this, we need to prepare the root environment and apply the correct bypass modules.

Installing Magisk Correctly

You cannot simply flash Magisk immediately. The system must first be fully booted once to generate the init_boot and boot partitions correctly in the new environment.

  1. Download Magisk APK: Rename Magisk-vXX.X.apk to Magisk-vXX.X.zip.
  2. Reboot to Recovery: Power off and boot into LineageOS Recovery.
  3. Sideload Magisk: Apply the Magisk zip via ADB sideload just like the ROM and GApps.
  4. Reboot System: Once installed, reboot.

Resolving the Play Integrity NETWORK_ERROR

The NETWORK_ERROR is notoriously difficult to fix because it is a server-side check. However, specific module configurations can force the device to report a “basic integrity” and “ctsProfile” pass.

  1. Install Play Integrity NEXT (PI NEXT) Module:
    • Open the Magisk app.
    • Go to the “Modules” tab.
    • Select “Install from Storage” and choose the PlayIntegrityNEXT.zip file you downloaded.
  2. Clear Play Services Data: Before rebooting, go to Settings > Apps > Show System Apps > Google Play Services > Storage > Clear Data. This forces the Play Services to re-register with the Play Integrity API upon reboot.
  3. Reboot: Restart the device.
  4. Verify with YASNAC: Download YASNAC and run the test.
    • If you still get NETWORK_ERROR: This indicates a deeper issue with the MagiskHide/zygisk environment or the device’s inability to reach the attestation servers due to network routing (e.g., AdAway or custom DNS). Ensure Zygisk is enabled in Magisk settings. If you have “Enforce DenyList” enabled, ensure Google Play Services and Google Play Store are checked.
    • Advanced Fix for NETWORK_ERROR: Sometimes, the issue is that the device is reporting “Unlocked” status. Using a module like “MagiskHide Props Config” (though deprecated) or a custom build.prop edit might be necessary to spoof the device fingerprint to a certified device (like a Pixel). However, on Android 15, this is less effective. The primary fix is ensuring the PlayIntegrityNEXT module has updated fingerprints.

Fixing the “App Not Installed” Error

If you can log in to Google but still cannot install APKs, the issue is likely with the Android Package Installer or Magisk’s systemless host.

  1. Check Magisk Modules: Disable all modules except PlayIntegrityNEXT and reboot. If APK installation works, one of your other modules is the culprit.
  2. Re-flash GApps: The “App not installed” error often points to a corrupted GApps installation. Reboot into recovery and sideload Mindthegapps again without wiping data.
  3. Update Magisk: Ensure you are using the latest canary build of Magisk. Older versions have trouble with Android 15’s new security features.
  4. Verify APK Signature: If you are trying to install an APK that is signed differently than the Play Store version (e.g., a modified APK), Android 15 is extremely strict. You may need to uninstall the existing version of the app completely (via ADB pm uninstall) before installing the new one.

Advanced Troubleshooting and Partition Management

If the steps above do not fully resolve the issue, there may be hidden partition corruption or conflicting values in the persistent persist partition.

The Persist Partition and Sensor Calibration

The persist partition contains essential device calibration data, including IMEI and sensor data. Sometimes, flashing custom ROMs can corrupt this partition, leading to weird hardware-level failures that mimic software errors.

Vendor Component Compatibility

OnePlus 6 uses vendor and radio partitions that must match the Android version you are flashing. Since OxygenOS Android 11 is the official last version, and LineageOS 22.2 is based on Android 15, there is a massive gap. LineageOS maintainers usually bundle the necessary vendor upgrades. However, if you flashed a mismatched vendor image previously, this can cause attestation failures.

Ensure you are dirty flashing the vendor upgrade if it is provided in the LineageOS installation instructions for enchilada, or revert to the latest OxygenOS vendor before the clean flash procedure described above.

Conclusion

Resolving the Google Login issue on OnePlus 6 LineageOS 22.2 requires a methodical approach that addresses the Factory Reset Protection lock, the Play Integrity NETWORK_ERROR, and the underlying file system integrity. We have established that a simple factory reset is insufficient due to the persistent nature of FRP and the strict requirements of Google’s new integrity checks.

By strictly adhering to the full firmware reset protocol—returning to OxygenOS, clearing the account, and performing a zero-wipe installation of LineageOS followed by the specific configuration of PlayIntegrityNEXT—the vast majority of users can restore full functionality. Patience during the initial boot phases and careful attention to the order of operations (GApps before Magisk, Magisk before modules) are the keys to success. If all else fails, ensuring the device’s vendor firmware is compatible with the Android 15 base is the final frontier of troubleshooting for the OnePlus 6 community.

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