screen unlock problem - Xiaomi Mi CC9 / Mi 9 Lite Questions & Answers

Hello. something weird is happening with my phone. When i try to unlock it using PIN, i can't, screen goes off. If I take out my sim and SD card, I can unlock it, again i put cards in and i cant unlock it. on pin screen it just goes black. two hours ago it was working fine.

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Help! AT&T Tilt will not fully boot!! Shuts off!!!

Hi, I have had numerous problems with my AT&T Tilt that I have always been able to have fixed here. This time I must say it is the strangest. Whenever I turn my phone on it goes through the normal boot up. The ATT page comes up and then the 3G bars up come on. Next, the green windows 6.1 screen comes on. Then the phone flashes my personal information with the top portion saying that there is no service to be found. The battery meter reads full before the phone automatically shuts off. When I try to turn the phone back on after that it turns on in the boot loader mode with the multi color screen.
The screen reads:
KAIS1*0
SPL-3.56.0000
CPLD-8
with serial at the bottom of the screen, or USB if plugged into my computer.
Update!
When I turned my phone on without the sim card in it, the phone fully booted up and stayed on!
Have been unable to get it to boot up now with the sim card in since it turns on with the multi color boot loader screen about half of the time. Will post what happens when I get the phone to turn on!
What if you use another sim?
For troubleshooting purposes, I woudl reccomend trying to boot it up with a diffrent SIM in there... Sims CAN "go"... I had one go on me once and my phone would jsut lock up during booting (on my old Motorola MPX200 WM2003se)... Went to my carrier, and seeing as my sim was a few years old they upgraded me to a newer sim for free... Hope that is all your problem is
jmelgdog said:
When I turned my phone on without the sim card in it, the phone fully booted up and stayed on!
Have been unable to get it to boot up now with the sim card in since it turns on with the multi color boot loader screen about half of the time. Will post what happens when I get the phone to turn on!
Click to expand...
Click to collapse
I am having the same problem, but I think I caused it. I had an older mobile pohone with a Cingular SIM card still in it. I swapped the SIM cards because I wanted to use the old phone, but did not want to lose the old card (I really don't know why...). Anyhow, now my Tilt will not recognize the new card when I stick it back in?!
I did search Google, and found this: http://forums.wireless.att.com/cng/board/message?board.id=cingular&message.id=106311
Tilt SIM problem
if it will recognize one SIM but not the other then it is most likely the Sim that is bad. try cleaning the gold contacts on the sim with a pencil eraser to take off any stains or dirt stuck to it.

TyTN II shutting down after Green Windows Mobile Screen

I really don't how how this problem has cropped up. Have had my TyTN II for the past 6 months and suddenly today afternoon it was off when I tried to use it. While turning on, it went upto the Green Windows Mobile 6.1 screen and then it simply turns off. What is the problem? Have tried a hard reset and still have the same problem.
Have you tried re-flashing your phone, with the original manufacturers rom.
enter bootloader by holding the camera button and pressing soft-reset.
then try connecting via USB and running your manufacturers rom update.
this will wipe all your data, but chances are, if you have already hard-reset then you will have lost all data.
I had made no changes to the ROM. It had the stock HTC Windows Mobile 6.1 ROM included.
try taking out the sim and sd card, then hard reset.
OK, it boots up without the SIM Card but not with the SIM card. Tried another SIM card but same problem. What could be the problem? My SIM card is working fine on other phones!
blue_earth said:
OK, it boots up without the SIM Card but not with the SIM card. Tried another SIM card but same problem. What could be the problem? My SIM card is working fine on other phones!
Click to expand...
Click to collapse
Is the sim card door locked and closed properly? There's a little microswitch that shuts down the device if it senses the door isn't locked it's possible for this to not be correctly aligned with the lock pin (ie not in the groove). Turn it off and take a good look at the mechanism and you'll see what I mean.
Additionally, you mention you'd tried a hard reset - did you try this with the sim and memory card out from within WM? Did the process complete properly?
I tried booting with 2 other sim cards and with them it says that there is no sim inserted. With my original SIM, it simply shuts off at the green windows mobile screen.
@Flying Kiwi, Yes, the SIM door is closed properly with that little notch extended to the right. The hard reset was done not from with WM but by the method given in the manual i.e keeping the 2 soft keys pressed and hitting the reset pin. This was done at the Smart Mobility screen with SIM and Memory Card inserted. The process did complete properly but while booting it shut off. So I removed the SIM and this time it went all the way to the screen alignment page and customizing stage. Now, it does not work with any SIM card but boots up fine without SIM.
I'm completely at a loss.
It could be a bad sim holder (surely there is a better word) or something like that. I would suggest playing around with it by opening the keyboard and then applying pressure on the door while it boots.
blue_earth said:
Flying Kiwi, Yes, the SIM door is closed properly with that little notch extended to the right.
Click to expand...
Click to collapse
It was a long shot because with my TyTN II if I try that (with the WM 6.0 ROM) it gets all the way into WM and pops up a message about the sim door saying it'll shut down in 10 s - making it very clear - I've never tried it under WM 6.1 though.
Now, it does not work with any SIM card but boots up fine without SIM.
Click to expand...
Click to collapse
Could still be some sort of ROM corruption so what I'd like you to try is to remove BOTH the sim and memory card and boot into WM then perform a hard reset from within WM (settings -> System tab -> Clear Storage) and see if that runs right through to the end - then power off normally by holding down the power button and tapping yes. Then put in just the sim (that used to work fine with this phone) and start up again. Let us know how that goes Also have a look for any dirt/contamination in the sim slot as best as you can see, and on the sim itself.

[Q] Unlocking SIM on XT890 Razr i

I am trying to use the 16 digit unlock code from Mobile Unlocked but it doesn't work, not only that but the unlock process is going very strange on my phone. when I first put the SIM in it said "pin is incorrect wait for penalty timer". So I waited and then put in my code, but when I pressed to enter it a message flashed for a split second, to fast to read, and it reset the typing field to blank again. Then when I reset the phone it gave me the same "penalty timer" message. What is going on? Have I hard locked the phone, is it faulty?

[Q] Nexus One won't unlock after lock

I have a Nexus One with a weird problem. When i reboot it, it works fine, until i lock it with the lock button (screen goes out). After that i cant unlock it anymore, if i try only the buttons at the bottom come on. But if i wait a while (say, an hour or so) i can again unlock it.
Does anyone have any idea on how to fix this problem?
P.S. This may have happened after i bashed the phone into my table a couple of times for giving me trouble

Startup PIN lock fail after 5.1 update

Sideloaded 5.1. When it reboots (tried several times), it quickly gets to the device boot pin screen, where it used to sit forever until you entered the pin. Now, it will show the screen, but continue to boot behind the scenes. When you swipe up to unlock after boot, you get the keypad from the original boot pin screen, and the whole thing hangs. I've tried this several times and also disabled/reenabled PIN. NO luck.
Only way past is to immediately enter boot pin when the screen appears, but before finishing the full boot.
Second problem that many are having - trusted places (home/work) do not function after update. If you revert Google Play Services back to pre v7, it works again. I'm sure Google is all over this as many are talking about it.
**UPDATE**
More troubleshooting reveals that this happens only when you have both a startup PIN and SIM pin lock on the phone. If I remove the SIM lock pin, then it boots correctly, stopping at the startup PIN screen until entered. If I add a SIM pin, then it boots "through" the startup PIN, to the SIM PIN screen. Upon entering SIM pin, it takes you to regular lock pin screen, where it immediately hangs until reboot.
Anybody else experiencing this? Both pin's worked fine under 5.0.1

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