Quick Summary (Key Takeaways)

The Problem: Standard resets and engineer codes like *#813# are completely disabled on Android 14 FRP bypass patches.
The Fix: Use the “Clone Phone” app to inject “Activity Launcher” into the locked device.
Crucial Requirement: The sender phone must be an OPPO, Realme, or OnePlus. Transferring from Samsung or Redmi often causes the app to crash due to signature errors.
If Reset is Grayed Out: STOP. Do not restart the phone. Set a new “System Fingerprint” and back out to the start screen. Restarting will wipe your key!

Buying a second-hand phone should be a bargain, not a burden. Take Liam, for example. He purchased a used OPPO A78 5G, performed a factory reset, and immediately encountered the Google “Verify your account” screen.

Like many users, Liam felt the device become a paperweight. He tried the *#813# code (famous from the OPPO A15 FRP bypass era), but dialing it now yielded silence. He tried the TalkBack FRP bypass gestures he saw on YouTube, but the menu refused to appear. Liam was unaware that OPPO’s recent Android 14 and 15 updates have patched these older exploits.

This is part of a broader change across OPPO devices. If you want to understand how FRP bypass methods differ across OPPO models and Android versions (11–15), you can refer to our complete OPPO FRP Bypass Master Guide (2025), which maps out what still works — and what no longer does.

Facing a locked device is stressful, but it is not permanent. This guide addresses specific frustrations—from the Clone Phone app crashing to the missing Share option. We will walk you through a verified workflow to reclaim access.

Pre-Requisites: The “No-Fluff” Toolkit

Before you start, let’s be realistic. Many FRP bypass without PC guides skip these details, leading to failure.

A Valid SIM Card: You must have a SIM card inserted in the locked OPPO device. It does not need credit, but it must be detected to activate the “Message” app. Without it, the “Send” button is dead.
The Right Sender Phone: Do not use a Samsung, Xiaomi, or Pixel. You need a secondary device from the BBK family (OPPO, Realme, or OnePlus).
Patience for the “Flash Loop”: If the Activity Launcher app starts flashing uncontrollably, do not panic. We will discuss the fix below.

Method 1: OPPO ColorOS 14 FRP Bypass (Clone Phone Fix)

The most effective method for 2025 uses “Clone Phone” to inject a launcher. However, we need to get to the browser first.

Phase 1: Accessing the Browser (The SMS Bridge)

Connect to Wi-Fi: Connect to a strong network.
QR Code Entry: On the Wi-Fi password screen, tap the Share icon (QR code) > Nearby > Turn on.
Need Help Sharing: Tap the link “Need Help Sharing?” at the bottom.
Share Article: Tap the three dots (top right) > Share Article.
The SMS Bridge: Select Message.
Critical Step: Select “New Message” and enter 112 as the recipient. In the body, type www.youtube.com and hit Send.
- Note: The message will fail (red icon), but the link will turn blue.
Open Chrome: Tap the YouTube link > Profile Icon > Settings > About > Terms of Service. This opens Chrome.

Accessing the Browser

Phase 2: The Clone Phone Injection

Open Settings: In the browser, search for a trusted tool site (like AddROM) and select Open Settings.
The “Fake” Home Screen: Go to Home Screen & Lock Screen > Home Screen Layout.
- Warning: You are now on a temporary overlay. If the screen locks, you start over.
Open Clone Phone: Find the “Clone Phone” app.
Prepare Sender Device:
- On your unlocked OPPO/Realme sender, download Activity Launcher from the Play Store.
- Open Clone Phone on the sender, mark it “Old Device.”
- Mark the locked unit as “New Device.”
The Expert Transfer: Scan the QR code. Deselect everything except Apps > Activity Launcher. Start migration.
Launch: Once done, tap “Done” on the sender and “Open” on the locked unit.

Troubleshooting: The Screen Flash Loop On some A-series models, Activity Launcher flashes black and white. Fix: Hold Volume Up + Power to force a restart. Repeat the process but transfer QuickShortcutMaker instead.

Go to Home Screen & Lock Screen

Fix: ColorOS 15 Reset Settings Grayed Out & System Fingerprint

This is the most critical part of the guide. In the January 2025 patches, OPPO disabled the “Reset Phone” button in temporary settings. If you see this grayed out, DO NOT PANIC.

The “Security Overwrite” Procedure:

Navigate to Security: Find Password & Security (not System Settings).
Set a New Lock: Select Fingerprint. The system will require a PIN first. Set a simple one (e.g., 1234).
Add Fingerprint: Register your finger.

⚠️ The Safety Check (DO NOT RESTART)

Crucial Variation: Unlike older methods, do not restart the device yet. On the newest patches, a reboot wipes the temporary user data, deleting the fingerprint you just set.

The Correct Move:

Tap the Back arrow repeatedly until you return all the way to the initial “Hello” screen.
Proceed through the setup wizard again.
When asked for the old Google account, you will now see an option to “Use Device PIN” or verify via the fingerprint you just added.
Unlock it, and then perform a factory reset from the main menu.

Alternative Entry: Keyboard GIF Exploit & Missing Share Button

If the “Nearby Share” menu is missing (common on carrier-locked units), try the “Keyboard GIF” backdoor.

Trigger Keyboard: Tap the “Add Network” field.
GIF Search: Tap the GIF icon in the keyboard toolbar. Select any random GIF.
The Hidden Share: Look closely at the preview image of the GIF. You should see a small Share icon or three dots inside the image.
Bridge to Message: Tap that icon > Message > Send www.youtube.com to 112.

FAQ: Why Old Codes Like *#813# Failed

The *#813# engineer mode code was a staple of Android 11 FRP bypass. It allowed users to skip directly to the Home Screen.

The Evolution:

Android 11: Code worked instantly.
Android 12/13: Code patched; users shifted to TalkBack.
Android 14/15: Reset button disabled; requires “Clone Phone” injection.

Dialing *#813# on a modern OPPO will result in silence because the underlying Engineer Mode permission has been revoked in the kernel.

Conclusion

The frustration of a locked smartphone is intense. By moving away from outdated dialer codes and using the Clone Phone injection, you align with ColorOS 14’s architecture.

Remember the golden rule of 2025: If the reset button is grayed out, set a fingerprint and go BACK, do not reboot. Follow these steps, stick to the BBK ecosystem (OPPO/Realme) for your sender phone, and you will regain control of your device.

OPPO FRP Bypass Android 14/15: Fix “Clone Phone” & Grayed Reset (2025)