I have red mi note 4 devices after update device with miui version 9 attempt to enable installation via application via USB, it doesn't work and shows "This device is temporarily restricted". The solution I found didn't work.
Without that feature, I can't develop an application.
Model redmi note 4
miui version: 9.0.5.0
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Sanjay Bhalani
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Possible duplicate of [Install app via usb: The device is temporarily restricted](https://stackoverflow.com/questions/46020237/install-app-via-usb-the-device-is-temporarily-restricted) – Alex P. Dec 28 '17 at 00:37
3 Answers
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I faced the same issue. I was not able to enable Install Via USB option, however, I found a solution that actually worked.
Here are the steps to enable it.
- Install PlexVPN app on your mobile phone
- Open PlexVPN then set VPN to China (e.g China-Shanghai) and connect
- Go to Developer Options and enable Install Via USB option
- Enjoy :)

achyut pokhrel
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1If you don't want to install any 3rd party app, then go for this solution: Due to some reason, requests from out of the China servers are getting rejected, so I connected to one open China VPN and tried again to enable 'Install via USB' and I got success. For detailed solution and VPN details, see this useful Youtube video: [https://youtu.be/MeKUJlD-Ke4][1] [1]: https://youtu.be/MeKUJlD-Ke4 – Perry Dec 18 '17 at 06:05
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PlexVPN is paid for china-shanghai @Perry sadly first link is not used anymore, second link vpn connection goes unsuccessful – Md Sifatul Islam Sep 29 '18 at 06:49
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For me, the only solution that worked is to toggle on OEM unlocking
Only then I could enable Install via USB and other options that previously restricted

idiotme
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yes the solution is VPN you need chinese serevr for proxy , should is buy vpn or i can do it for free , follow the links below i faced the problem before so here is answer

Rizwan
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1While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes. - [From Review](/review/low-quality-posts/21336094) – Blastfurnace Nov 06 '18 at 07:59
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i have edited my answer . solution is vpn need chinese server . thanks for the review , i will keep this in my mind in the future. please dont vote me down i am already low. and i was trying to help nothing else – Rizwan Nov 06 '18 at 08:22