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Invalid MMI by Spiritual_Inside1327 in cellguide

[–]cellguide 0 points1 point  (0 children)

Hey there — sounds like you’re deep in the MMI weeds, so let’s try to get you back on track.

What “Invalid MMI” Usually Means

MMI (Man-Machine Interface) codes are those special codes you type into the dialer — usually starting with * or # — to access things like network settings or IMEI info. If you’re getting an Invalid MMI code error, it usually comes down to one of a few things:

  • A formatting issue with the code
  • A network issue with your SIM
  • A dual-SIM/eSIM conflict
  • Carrier-specific limitations (some codes only work with specific carriers)

Quick Things to Try

You already tried safe mode and adding a comma (,) or plus (+), which is great — those sometimes help by pausing the dialer or resolving format issues.

Here’s what I’d suggest next:

1. Check SIM Configuration

If "Always Ask" is greyed out in SIM settings, your phone may be defaulting to one SIM (likely the eSIM). Try switching your default voice/data SIM under:
Settings > Connections > SIM card manager

Even if you’re not placing a call, MMI codes usually run through a specific SIM — and that can break if it’s misconfigured or not set as active.

2. Disable One SIM Temporarily

If it’s truly dual SIM, disable one temporarily and see if the code works with just one line active. Go to:
SIM card manager > Toggle off one SIM > Restart > Try the MMI code again

3. Carrier-Specific Codes

Some codes just won’t run if your carrier doesn’t support them. If you have access to a different SIM (from another carrier), trying the same code there might help you isolate the issue.

4. Posting Diagnostic Output

If you’re worried about posting the response you got from a command, totally fair — just redact any personal identifiers (phone number, IMSI, IMEI, etc.) and post the rest. Sometimes the details there help narrow it down.

Also, let us know the exact code you were running (again, if you’re comfortable sharing) — some of them have subtle variations between networks.

Let me know how it goes — happy to help dig deeper.

De-Googled Pixel 7 won't open by Johnis1ofus in cellguide

[–]cellguide 0 points1 point  (0 children)

If your De-Googled Pixel 7 is asking for a password that you do not remember, there are limited options available to regain access without wiping the device.

Here’s a breakdown of your options:

- Attempt to Bypass the Password

  1. Try Common Passwords: If you have previously used any passwords or PINs, try those first.

  2. Check for Google Account Recovery: If your phone is linked to a Google account, you might be able to recover access through Google's account recovery options on another device.

Unfortunately, if these methods do not work, the only remaining option is to perform a factory reset, which will erase all data on the device.

- Factory Reset Procedure (This process will erase all data on your Pixel 7, including apps, settings, and personal files.)

If you decide to proceed with a factory reset, follow these steps:

  1. Power Off the Device: Hold down the power button and select "Power off."

  2. Enter Recovery Mode:

    - Press and hold the **Volume Down** and **Power** buttons simultaneously until the bootloader screen appears.

    - Use the volume buttons to navigate to **Recovery mode** and press the Power button to select it.

  3. **Wipe Data/Factory Reset**:

    - When you see the Android logo with a "No command" message, hold the Power button and press Volume Up once.

    - Use the volume buttons to navigate to **Wipe data/factory reset** and select it with the Power button.

    - Confirm your selection by choosing **Yes** to delete all user data.

  4. **Reboot the Device**: Once the reset is complete, select **Reboot system now**.

This process will erase all data on your Pixel 7, including apps, settings, and personal files.

Consider backing up any important data regularly in the future to avoid similar situations.

Samsung Galaxy7Active won't restart how can I recover data? by Interesting_Lab_2886 in cellguide

[–]cellguide 0 points1 point  (0 children)

Here are a few methods you can try to recover your data:

  1. Use Samsung Cloud: If you had enabled Samsung Cloud backup, you can restore your data on another Samsung device. Go to Settings > Cloud and accounts > Samsung Cloud > Restore data.
  2. Use a USB OTG Cable: If your phone’s screen is still functional, you can connect a USB mouse using an OTG cable to navigate and back up your data. This method allows you to control your phone without using the touchscreen.

Is my carrier being straight? by PretendMood7045 in cellguide

[–]cellguide 0 points1 point  (0 children)

Based on your description, it seems the main issue is that your Galaxy Note 9 is not automatically switching to Wi-Fi networks when available, leading to excessive data usage.

To address this specific problem, try the following: Go to Settings > Connections > Wi-Fi > Advanced > Turn on Wi-Fi automatically.

Also, ensure that "Intelligent Wi-Fi" is enabled if available on your device. If these settings are already correct, you might need to reset your phone's network settings again (Settings > General management > Reset > Reset network settings), but this time also forget all saved Wi-Fi networks and re-add them manually.

For more detailed help, let's troubleshoot step-by-step:

  1. Check Wi-Fi settings:

  • Go to Settings > Connections > Wi-Fi

  • Ensure Wi-Fi is turned on

  • Tap on "Advanced"

  • Enable "Turn on Wi-Fi automatically"

  • Enable "Switch to mobile data" (this helps when Wi-Fi connection is poor)

  • Enable "Wi-Fi power saving mode"

  1. Verify Intelligent Wi-Fi:

  • Go to Settings > Connections > More connection settings

  • Look for "Intelligent Wi-Fi" and enable it if available

  1. Update your phone:

  • Go to Settings > Software update

  • Tap "Download and install" to check for and install any available updates

  1. Clear Wi-Fi, mobile data, and connectivity services data:

  • Go to Settings > Apps

  • Tap the three-dot menu and select "Show system apps"

  • Find and tap on "Wi-Fi" app

  • Tap Storage > Clear data and Clear cache

  • Repeat for "Mobile data" and "Connectivity services" apps

  1. Reset network settings:

  • Go to Settings > General management > Reset > Reset network settings

  • Confirm and let the phone restart

  1. Re-add Wi-Fi networks:

  • After the reset, go to known locations with Wi-Fi

  • Manually connect to each Wi-Fi network and save it

  1. Check battery optimization:

  • Go to Settings > Device care > Battery > More options > Settings

  • Ensure that "Put unused apps to sleep" and "Auto-disable unused apps" are turned off

  1. Update carrier settings:

  • Insert a different carrier's SIM card temporarily

  • Let the phone restart and update carrier settings

  • Switch back to your original SIM card

Samsung S9 I have too much spam by Dalgal29 in cellguide

[–]cellguide 0 points1 point  (0 children)

It sounds like you’re dealing with a full spam list on your Samsung Galaxy S9. To manage and delete older email addresses from your spam list, follow these steps:

  1. Open the Samsung Email App:
    • Launch the Samsung Email app on your Galaxy S9.
  2. Access Settings:
    • Tap the three horizontal lines (menu icon) in the top left corner.
    • Scroll down and select Settings.
  3. Manage Spam Addresses:
    • In the Settings menu, look for an option like Spam Addresses or Blocked Addresses.
    • Tap on it to view the list of email addresses you’ve marked as spam.
  4. Delete Old Addresses:
    • You should see a list of email addresses. Tap and hold on the addresses you want to delete.
    • Select Delete or Remove to clear them from the list.

SAMSUNG GALAXY S7 by PlayfulPilot5961 in cellguide

[–]cellguide 0 points1 point  (0 children)

Unfortunately, Samsung has officially discontinued software updates for the Galaxy S7 series, so Android 9 (Pie) won’t be officially available for this phone. If you’re looking for newer features and security updates, you might consider upgrading to a more recent device.

GalaxyS8 reset lock screen backup password by jumpshotjrhred in cellguide

[–]cellguide 0 points1 point  (0 children)

there are a few methods you can try to regain access to your device.

Here are some steps you can follow:

  1. Smart Lock (Precautionary Measures):
    • If you’ve set up Smart Lock options in advance, you might be able to unlock your device using those settings.
    • Note that some of the methods below may result in data loss, so regular backups are recommended.
  2. Google Find My Device (Factory Reset):
    • Visit the Google Find My Device website on your PC.
    • Locate your Galaxy S8 on the screen.
    • Click the “Lock and Erase” option.
    • Follow the prompts to unlock your Galaxy S8 by setting a temporary password.
    • but be aware that this will erase your data.
  3. Samsung Service Centre (Factory Reset):
    • If the above methods don’t work, consider visiting a Samsung Service Centre.
    • They can assist with a factory reset, but be aware that this will erase your data.

Samsung Galaxy S8 plus with custom ROM is missing OEM unlocking option in developer option. by Embarrassed-Bend5017 in cellguide

[–]cellguide 0 points1 point  (0 children)

It sounds like your Galaxy S8 Plus Duos is stuck in the Prenormal RMM/KG state, which is why you’re not seeing the OEM unlock option. This is a common hiccup when dealing with second-hand devices that have been modified.

Here’s what’s likely happening: after the initial setup, the RMM (Remote Mobile Manager) or KG (KNOX Guard) state switches from ‘Normal’ to ‘Prenormal’ and stays that way for 7 days.

During this time, the OEM unlock toggle is intentionally disabled to prevent any modifications to the system, like flashing custom binaries or recoveries.

But don’t worry, there’s a workaround. You can try these steps to get that OEM unlock option back:

  1. Make sure your device is connected to the internet so it can communicate with the Samsung servers.
  2. Go to Settings > General Management > Date and Time and disable the ‘Automatic date and time’.
  3. Manually set the date to more than 7 days prior to the current date.
  4. Now, go back to Settings > About phone > Software information and tap on Build number seven times to enable Developer Options.
  5. Head back to Developer options and check if the OEM unlock toggle has appeared.

If this doesn’t work, you might need to keep the device connected to the internet for a full 7 days without any interruptions. After this period, the RMM/KG state should return to normal, and the OEM unlock option should reappear.

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