1. Android Central Question's Avatar
    for a few years now i own a Mi A2 Lite Android 10 phone.
    about a year ago i changed my sim card to a new number, ever since then i could not install the system update, but could live with that.

    Recently there is a security update, which i can not install as well, and i feel like this is the time to solve this problem.

    I no longer have the old sim card or the old number, just the new one.
    Please advise on what can i do to have updates again system and security.
    07-26-2021 11:30 AM
  2. mustang7757's Avatar
    When you check for software update manual in settings does it give a error?

    I'll leave a Link to register so you can communicate here as a guest account you can only post questions but can't reply

    07-26-2021 01:01 PM
  3. Tak121212's Avatar
    Hi, thank you for replaying
    the screen says "Security update available" and "couldn't download"
    07-26-2021 02:07 PM
  4. B. Diddy's Avatar
    Welcome to Android Central! You're unable to do it on wi-fi either?

    Did you get this phone directly from a carrier, or did you buy it unlocked and bring it to your carrier? Carrier-branded phones often require the phone to be on that carrier's network in order to get the official update.
    07-26-2021 02:22 PM
  5. Tak121212's Avatar
    i got the phone from online store, and then put the sim card from my first carrier in it, it all worked fine, i got all the updates.
    Then i change carrier and change sim card and it stopped updating, telling me to switch back to my first sim, which was already done for by the time i got the error message trying to update.
    07-26-2021 02:43 PM
  6. B. Diddy's Avatar
    Who was the first carrier? Some carriers can actually carrier lock an unlocked phone simply by inserting their SIM card. Contact the first carrier and ask if there is some way to release that lock.

    You might also try the Reset Network Settings option in the system settings.

    Otherwise, you might have to do a factory reset.
    07-26-2021 02:51 PM
  7. mustang7757's Avatar
    Hi, thank you for replaying
    the screen says "Security update available" and "couldn't download"
    Hi , so just to clarify.. if you tap software in settings it says can't download after ? You on wifi when this happens or mobile data like 3g,4g etc?
    07-26-2021 08:02 PM
  8. Tak121212's Avatar
    B. Diddy: i have called the first carrier, they said they are not capable of locking the phone, and told me to call my current carrier.
    my current carrier said sim problems are not their problem and told me to call the manufacture, it is a Xiaomi phone and i hold little hope for Xiaomi being helpful at all.

    In the reset system options menu i have a "reset Wi-Fi, mobile & bluetooth" option, do i need to prepare some thing to run after the reset ? what do i do after i do a reset ?

    mustang7757: in "system" menu there is a "system update" option, when i press it the screen says "Security update available" and "couldn't download" and nothing more.
    I do not have Wi-Fi, just the mobile plan which is 4G.
    07-27-2021 04:45 AM
  9. mustang7757's Avatar
    Try a good public WiFi , some won't update over mobile date 4g
    07-27-2021 09:32 AM
  10. B. Diddy's Avatar
    After you reset network settings, the mobile network should try to reconnect. You could always remove the SIM card and reinsert it to see if that gets it to connect. You'd have to reconnect to your wi-fi and Bluetooth devices yourself.
    07-27-2021 10:45 AM
  11. Tak121212's Avatar
    I tried using Wi-Fi to update the phone and it was able to download the security update, and now says it is fully updated.

    Thank you for the help mustang7757 and B. Diddy, with out it i would be lost.
    mustang7757 and B. Diddy like this.
    08-02-2021 12:22 AM
  12. mustang7757's Avatar
    08-02-2021 12:54 AM

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