Can you switch through official ROMs with the bootloader locked?


I just bought a Chinese Redmi Pad SE from the usual chinese site with Global rom, locked bootloader. How are they able to do that?!
I tried to unlock, but as expected, it cannot add account. OTA does not work in china device with global rom (which seller indicated).

Device Model: 23073RPBFC
OS version: 1.0.2.0.UMUMIXM

My problem nowis how do I update my firmware version? I did find the global version v1.0.2.0 -> 1.0.3.0 OTA package (zip) online from miuirom.org, tried to update manually via "about tablet" screen, which didnt work and gave me a pop-up message saying:

"Cant verify update: Current version is invalid. You can only flash the latest stable ROM"

I can download global 1.0.3.0 fastboot rom, but would this brick my tablet like what everyone is saying "china phone + global rom + BL locked = brick device"??
The rom has been modified.
The only solution for you is to flash a Cn rom (edl mode) not free, then use a third party paid service for unlocking.
 
Thank you ToneLa and NOSS8 for the suggestions.

I did confirmed bootloader is locked, quite surprised the shop is able to flash global rom and re-lock the bootloader as all the information I can find is "it is not possible to flash global rom on china device and re-lock the bootloader, it will brick the device".

Yeah, looks like if I really want to bootloader unlocked on this china device, I need to pay someone who has lv5 xiaomi account that needs to be a chinese citizen.
This would be the last xiaomi china device I buy and will just get global version in future (until they disable unlock on those too)

Since it already has global rom v1.0.2.0, I am quite curious if I can just use a global fastboot rom v1.0.3.0 flash it directly onto this bootloader locked device.
Does anyone know if the fastboot flash would fail due to incompatible device error of some sore?

I guess its a cheap tablet anyways, I can just use it as it is without bothering to upgrade the rom which should last for a few years anyways.
 
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As it stands, it is not possible to unlock the bootloader or flash anything, failures or bricks assured.
 
Can someone explain what's so special about the process that anyone has to pay?

If its literally paying someone for account level stuff... Don't.

I get my devices from China and have done it all myself for like ten years now.

I suggest, OP, that you reveal who the retailer is, as they are just creating issues further down the line

Do hope you get on OK with the next steps.
 
Devices released with Hyper OS are not unlockable with official tools.
Cn devices with a global rom, Miui / hyperOS, with the locked bootloader can only be unlocked with the rom corresponding to the model, that is to say CN and the only way to flash the CN rom is the EDL mode.
 
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Thanks.
With one eye on the future then. Doesn't

G EDL level account cost 10k?
Prospective customers could "kickstarter" a designated account holder. But that's for the future of course..

These changes enforced by the Chinese government are noxious and do not bode well for the future of our treasured devices if you wish to break away from the straightjacket of official ROMs

.... Though we always find a way

The "paid third party service" element seems a grift though it does make more sense if you pay to get it

Though if there is a moral in this thread it is that shortcuts by some sellers are indeed too good to be true.
 
EDL flashing is cheaper than unlocking with a paid third-party service.
(note that flashing EDL does not unlock the bootloader)
The most popular paid third-party service is starting to have its access blocked, for the redmi t3/K70 and even the 14, according to some users who could not unlock the bootloader.
 
Yes, you are right.
Sorry to summon you to a thread you stopped commenting on a year ago but you seem to be the most knowledgeable person on this matter and I have no idea what I'm doing with phones. PCs I know, but phones just passed me by and I never caught up lol

So I've just got a Poco F5 with the global MIUI 14 ROM and I want to flash the EEA HyperOS ROM to it, I live in the UK and I like all the GDPR basically meaning you can get rid of all advertising and data tracking by just pressing one button, plus I've read it's generally just all around a little bit of a better ROM.

Anyway I'll be following this guide https://c.mi.com/us/miuidownload/detail?guide=2 and I just wanted to check something with you. Once I've unlocked the bootloader and flashed the official EEA ROM for the F5, I will then be able to re-lock the bootloader without issue, and apps that normally shout at you for having an unlocked bootloader like GPay/mobile banking apps/Google Play Store, will all work and be fine and dandy?
 
I don't really know if the same rule is applied to Poco phone models too:
"A global variant of a Xiaomi phone could unlock the bootloader, flashed and then bootloader locked back, whatever matching stock firmware you flash."
So in theory, I guess that in your case your plan should work.
But start by checking on next link if your phone is a global one: Xiaomi Product Authentication page
 
Thanks for the reply.

Yeah it's definitely a global version, was the first thing I checked after being sent the Chinese market version first.

So, enable developer options and do the stuff you have to do to flash a ROM, do all the account stuff and wait the 7 days to unlock the phone, use MiFlash to flash the ROM and then use the "clean and lock" function to lock the phone again after? Sound about right?
 
Is it possible to unlock and/or relock Bootloader without flashing a ROM? I don't want to loose any of my data and settings...
 
No. The process of unlocking or locking the bootloader itself will erase user data (hard reset)
 
I stuck at 99% in Mi Unlock says:
Couldn't unlock
Please add your account in Settings > Developer options > Mi Unlock status.

What and how to do? I've not seen it before on my devices.

And meanwhile, the Mi Community always lists that specific 0:00 opening opportunity as one day later. I don't get it. Does anyone knows what the heck is this?
 
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1. The step mentioned in the message about adding your Mi account on the Mi Unlock status is a must. Without it you will not be able to unlock the bootloader.
2. Once unlocked the bootloader, you will be able to relock the bootloader and then unlocked back as many time as you wish. But be careful, the bootloader locking should be executed only when the phone have been flashed with stock Xiaomi firmware. There are some rules, which were mentioned many times, for that check my 8th post from previous page.
 
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Sorry to ask this stupid question but i am not a person that knows what am i doing with my phone but, if i have an international version of a phone, can i flash and lock a ROM from Europe even though i eventually used a MIUI ROM that was ported from a Chinese ROM?
 
If you have an international (global) version (phone), then you can lock back the bootloader of your Xiaomi phone, ONLY if the flashed ROM is a STOCK one, no matter what variant, I repeat, it has to be an official stock ROM.
DO NOT try to lock your phone bootloader if the flashed ROM is a custom ROM, doesn't matter from what variant was ported.
 
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Hello, i have inherited a Mi 10 5G with a ******** local operator firmware, which is stuck to Android 12. I'm waiting the required time to unlock the bootloader as i would like to install the newer MIUI or HyperOS FW, but i would like also to relock the bootloader later as this would be my primary phone.
May i kindly ask you if will it work?
Thank you!
 
You have not provided any important information.
Is this a Global device?
What ROM is installed?

 
I know it has V13.0.1.0.SJBEUTI firmware, and is marked as "europe Tim carrier edition"
I would like to install another eu rom After unlocking

Thanks
You have not provided any important information.
Is this a Global device?
What ROM is installed?

 
You have a Global device and after unlocking the bootloader you can install any derivative of the Global ROM and then lock the bootloader.
See instructions.
 
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thanks i was able to update and relock, and the phone booted by following your post instructions! very useful!
I have an additional question if you don't mind. how can i be sure, in general terms, that once unlocked the bootloader i'm installing an official rom without any mal/spyware or rootkit (if they even exists in android)? I usually go directly to the manufacturer site, but for xiaomi only old roms are available for mi 10, eg hyperos isn't available.