SIM Activation Error - Xiaomi Mi 9 Questions & Answers

Greetings all,
I am a new owner of the Mi 9. I was able to successfully link a Mi account to the device, but I constantly get the SIM Activation Error after each reboot. Will this in any way prevent me from unlocking the bootloader when the time comes? Btw, I'm using my Mi 9 global edition with T-Mobile US.

Nope it won't. It only means that Xiaomi can't activate the SIM on their server (which makes sense since they are in China). It won't have any impact on anything. You can turn off Xiaomi Sync/Find My Phone if you don't want constant error after reboot

Hi! I was facing the same problem, but after weeks of testing i found some ways to fix it.
So, i did this guide to fix sim activation errors on xiaomi phones.

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Hi everyone
I have this issue in my device page of the MI account saying "SIM card isn't installed or activated" .I am regularly logged in and also bond my account to my device through developer options, how can I fix this?
I am on global device with official global rom stock 12.0.1
xNAPx said:
Hi everyone
I have this issue in my device page of the MI account saying "SIM card isn't installed or activated" .I am regularly logged in and also bond my account to my device through developer options, how can I fix this?
I am on global device with official global rom stock 12.0.1
Click to expand...
Click to collapse
Physically take out the SIM and move it to another slot and reboot first
If that doesn't work try reseat in the original slot and reboot
If that doesn't work maybe factory reset or update your firmware / flash the Eu etc
If your going to that much hassle you might as well get the latest features at the same time...

Question Sold my phone, new owner can't recieve text messages

In need of help to see what caused the issue.
I had installed TWRP and unlocked Bootloader to change from CHN ROM that it came delivered with from Tradingshenzhen.
I had EU Stable installed, I searched on the web how I could remove my Mi Account since it was still there after a factory/data reset in TWRP.
The information I found was to uncheck "Find my phone" in Mi Account settings, and do a Reset Data again in TWRP.
This solved the issue with removing the Mi Account on the phone.
The problem now is that the new owner can only send text messages but can't recieve em. Anyone have had same problem?
Grateful for answers!
Hi,
did you also delete this phone from your Mi Account on the Website?
Have you already made a factory-reset with the new SIM in the phone?
BTW: There shouldn't be problems with SMS-Messages, because they are tied to the SIM-card.
I can't find my phone on my Mi account after I did the last thing with uncheck find phone and then reset.
No factory-reset with new sim in phone, I just made the reset before and turned it off before I sent it.
Seems like the issue has been resolved automatically, the seller responds. So think it's all good!
Thanks

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