[Guide] Apply 3rd party themes! (Root required)

[DanDroidOS]

I found a way around the annoying "Error 402" when trying to apply a 3rd party/non theme store theme!


Steps I used for success:
1) Root with Magisk.
2) Download Root Explorer or a root file manager of your choice.
3) With Root Explorer mount system R/W, go to /system/build.prop, open build.prop in text editor, and change ro.build.type=user to ro.build.type=userdebug
4) Now download Miui Theme Editor and import 3rd party theme, save, and install.
5) Open theme app and apply theme with no errors.

Good luck!

 

[Angyann94]

Or install MIUI under Android 8 and there no trouble to apply theme of third party

 

[DanDroidOS]

Or install MIUI under Android 8 and there no trouble to apply theme of third party

I had read you can't apply third party themes unless you are a theme developer. I setup a theme developer account and was still not able to apply third party themes. I'm not sure about your situation but I wasn't able to use third party themes on China 8.0 alpha or Global 8.0 beta(8.1.11) even with Miui Theme Editor without the above method.

 

[Angyann94]

I'm xiaomi designer and on Miui 9 it was impossible to install a third party theme even with MIUI Theme Editor, they have established a new politic wich forbid all third party theme. But i'm beta tester and i don't know why but we've got update 8.1.11 Global dev beta and on this update we can apply all theme

 

[DanDroidOS]

I'm xiaomi designer and on Miui 9 it was impossible to install a third party theme even with MIUI Theme Editor, they have established a new politic wich forbid all third party theme. But i'm beta tester and i don't know why but we've got update 8.1.11 Global dev beta and on this update we can apply all theme

I wasn't able to on 8.1.11 and I just flashed 8.1.16 and same thing?!?! I have to edit my build prop and boom works like a charm, weird!

 

[Angyann94]

Ok cool

 

[MishaalRahman]

Does Substratum not work? Since it's running Oreo, it should work.

 

[bleached45]

Does Substratum not work? Since it's running Oreo, it should work.

Does substratum work on MIUI ROMs?

 

[MishaalRahman]

Does substratum work on MIUI ROMs?

It should since OMS is a part of AOSP now in Oreo.

 

[nicholaschum]

Does Substratum not work? Since it's running Oreo, it should work.

#Soon

 

[The Devils Killer]

I wasn't able to on 8.1.11 and I just flashed 8.1.16 and same thing?!?! I have to edit my build prop and boom works like a charm, weird!

Yes, me too I wasn't enable to apply any third party theme even with MIUI Theme Editor

thanks for sharing :good:

 

[Angyann94]

No trouble for me to apply a third party theme on official Global beta dev 8.1.18

 

[el3c]

Hmm... I ve edited build prop to userdebug but it didnt work. I am on 8.2.8 Global dev. Any ideas?

 

[punkmonkey1984]

Not working for me either on 8.2.8 beta

Sent from my Mi MIX 2 using Tapatalk

 

[gyuggd]

not working

Hey!
I tried your method.
When applying a theme it says "Unable to connect to network" so themes application needs an internet connection to verify.
With internet on, it just says same error (maybe different code): auth rejected -99.
Can you help me please?

Im on Global Beta 8.3.1, mi5.

 

[Ammitz]

Same error. I am on 8.3.8 Global beta, mi max prime

 

[MrBeanzT]

I'm xiaomi designer and on Miui 9 it was impossible to install a third party theme even with MIUI Theme Editor, they have established a new politic wich forbid all third party theme. But i'm beta tester and i don't know why but we've got update 8.1.11 Global dev beta and on this update we can apply all theme

Is it possible that u would need to submit ur theme to Xioami 1st then they publish it through theme store? Then we download it from theme store and that's the time it works.

Sorry, I'm na noob here at xda as well as with our device.

 

[minotavros]

Not working on latest dev rom

 

[MrBeanzT]

I found that setting my Region to India gives an option in Themes for Fonts. I can't seem to finds this option on the other regions i tried.

 

[ssojyeti2]

Not working on latest miui 9 stable