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After flashing a custom ROM, there is a watermark in the top-right of the screen saying

未写入google key和tee key

I've googled it and have tried several of the solutions suggested, but none have worked. Interestingly, most people get a slightly different variation of this message, in red.

I've removed "FactoryTest" from my phone, but do not have com.mediatek.factorymode as some have suggested. I've messed around with my IMEI keys, this did not help. The message also still appears even with the SIM card removed.

Where on the phone could this be stored? My phone is rooted, so if I could locate the file responsible, I could easily delete it.

Andrew T.
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KaptainKris
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3 Answers3

2

  1. Download Minimal ADB and Fastboot on the computer

  2. Plug in the phone into the computer, but keep the phone on

  3. On the computer, open the terminal/command prompt

  4. Enter these commands

    adb devices
adb shell
pm list packages
pm uninstall --user 0 com.mediatek.factorymode

  5. Restart the phone and the watermark will be removed

Andrew T.
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J Vids
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    Thanks, but this doesn't work unfortunately. Seems I don't have this package installed on my phone. – KaptainKris Jun 08 '20 at 11:15
  • @KaptainKris The watermarks are gone!! For me it worked. You have to leave the cell phone on, not in stand-by mode. In addition, USB debugging and OEM (bootloader) must be allowed in developer mode. Confirm USB debugging again when prompted after connecting the mobile phone to the PC. If you follow this, then the given commands will be accepted. Otherwise errors are displayed. It is actually quite simple. – Derjenige Feb 12 '21 at 01:23
  • it might be package:com.mediatek.engineermode, which I didn't risk to uninstall (I don't really know what's that). I did pm uninstall --user 0 com.android.watermark and so watermark is gone. You might need to lookup for a solution to actually fix it instead of hiding. In this case you need SNWriter, which I couldn't really use. – Mike K. Nov 14 '21 at 15:15
1

I successfully removed the watermarks with "tee" and/or "google" words in Ulefone Armor 3WT.

Many sources suggested 2 possible solutions:

  1. Kill the service name "sdrpmbFloat" from the Developer options (not work for me)
  2. Using ADB, delete the package called com.mediatek.engineermode or com.mediatek.factorymode or com.android.watermark (again, it didn't work for me, I couldn't find the packages)

But, I found another solution.

I had to comment/delete the line ro.agui_tee=TRUSTKERNEL in the file /system/product/build.prop (need root) just in case that line does not exist in the file /system/build.prop.

So, to root Ulefone with MTKroot app: https://www.ayudaroot.com/root/ulfone/como-hacer-root-en-los-telefonos-moviles-ulefone-armor-3wt/ (Spanish)

And where I found a similar solution: https://www.phonandroid.com/forum/threads/ulefone-armor-9-imei-manquant-et-erreurs-tee-google-resolu.208178/ (French)

Andrew T.
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user1286776
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0

You can kill/uninstall the sdrpmbFloat view service with root permissions. You should be able to go to Developer Options > Active Services to disable the service.

Source: https://forum.xda-developers.com/t/ulefone-power-3s-problem.3794521/post-77513923

LCZ
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