Why it is important to set the right time on your smartphone
Time on a smartphone is not just numbers on a lock screen; the clock’s accuracy depends on the synchronization of notifications, the operation of Google services, the correct display of call and message history, and the functioning of alarm clocks. On Xiaomi Mi 9 (codename cepheus), incorrect time settings can cause crashes in the user’s computer. MIUI, trouble NFC-Payments and even errors in geolocation.
This is especially relevant for users who travel frequently or switch to winter/summer time. Automatic network synchronization is not always perfect — manual adjustments are sometimes required. In this article, we will discuss all the ways to change time, including hidden settings for power users.
Method 1: Automatic time synchronization through a network
The easiest method is to entrust the setting of time to the operating system. MIUI on Xiaomi Mi 9 supports automatic synchronization with NTP servers (Network Time Protocol).
- 📶 Open the Settings. → Additionally. → Date and time
- 🔄 Activate the switch "Date and time Auto-Determination"
- 🌍 Enable the option "Time Zone Autodetermination"
If you don’t update your time after you turn on these options, try manually selecting another NTP server.
- Go to Settings → About Phone and 7 times click on the MIUI version to activate the Developer Mode.
- Back to Settings → Additionally. → For developers.
- Find the NTP Server and enter an alternative address, such as pool.ntp.org or time.google.com.
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If after the server change NTP Time is still confused, try to switch from mobile network to Wi-Fi – sometimes operators block the network. NTP-request.
Method 2: Manually set time and date
If automatic sync doesn’t work or you need to set a non-standard time (for example, to test applications), use manual mode:
- Open Settings → Additional → Date and time.
- Turn off the "Date and Time Auto-Detection" and "Time Zone Auto-Detection" switches.
- Click on Set a date and select the desired date in the calendar.
- Click on Set time and manually set hours and minutes.
- For a time zone, select a city from the list (e.g. Moscow, GMT+3).
Automatic synchronization disabled | Selected the correct time zone |Date corresponds to the current day |Time set to within a minute |Rebooted phone to apply changes
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⚠️ Note: When manually setting the time, some functions may not work properly:
- 📱 Google Play Services will be showing a warning about the wrong time.
- 🔒 Banking applications (SberBank, Tinkoff) can block the entrance.
- 📧 Notifications in Gmail and Telegram will come crashing.
Method 3: Time change through ADB (for power users)
If standard methods don’t work (for example, due to a MIUI failure), you can change the time via Android Debug Bridge (ADB), which requires debugging over USB and a computer.
Connect Xiaomi Mi 9 to your PC, activate Developer Mode (as described above), and enable USB Debugging in the developer settings.
adb shell
su
date -s YYYYMMDD.HHMMSSWhere YYYYMMDD.HHMMSS — This is the date and time in the format of a year month.Hours Minutes Seconds. For example, to set the time on May 15, 2026, 14:30:00, the team will:
date -s 20260515.143000What if the ADB does not recognize the device?
⚠️ Attention: Misuse of the right ADB It can cause data loss or soft-brick devices. Commands only run if you're confident in your actions:
settings put global auto_time 1
settings put global auto_time_zone 1Solving problems with time on Xiaomi Mi 9
If your smartphone time is lost or not updated, the reasons may vary, and here is a table of the most common problems and their solutions:
| Problem. | Possible cause | Decision |
|---|---|---|
| Time strays after reboot | Failure of the rtc (hardware clock) | Update your firmware or reset via fastboot |
| Automatic time is not updated | Blocking NTP by an operator or firewall | Change the NTP server or use a VPN |
| Time zone resetting | Conflict with the “Hours” or Google app | Clear the cache of the com.google.android.gms app |
| Time in the status bar and settings are different | Mistake in MIUI Launcher | Reset the launcher or reset the screen settings |
If none of these methods worked, check firmware integrity. 9 Time failures are often associated with partition damage /system. For diagnosis, perform in ADB:
adb shell dumpsys time_infoIn the conclusion, pay attention to the lines time and timezone. If they contain incorrect values (for example, time=0), you will need to flash the firmware.
Never gone |Rarely, once every few months |Often, once a week |Constantly, every day-->
Features of setting the time on custom firmware
If your Xiaomi Mi 9 runs on custom firmware (like LineageOS, Pixel Experience or crDroid), the time setting process may be different. AOSP-The firmware is not tied to Xiaomi servers, so:
- 🔧 Use standard servers NTP: 0.europe.pool.ntp.org or time.cloudflare.com.
- 🔄 In some firmware, the automatic time option is hidden in Settings → System system → Date and time.
- ⚙️ Magisk modules that change system time (e.g., FakeGApps) require separate setup.
On custom firmware without Gapps, time can only be synchronized via mobile, as there are no Google services for precise synchronization. If you use firmware without GMS, install an alternative synchronization application, such as ClockSync.
How to check the accuracy of time on Xiaomi Mi 9
To make sure that the time on your smartphone is set correctly, use the following methods:
- Compare with standards: Open the site time.is and compare the readings.
- Check through ADB: Run the adb shell date command, which will show the current system time.
- Notification Test: Send yourself an email to Gmail and check if the time of receipt matches.
If the difference is more than 5 seconds, it indicates synchronization problems. For accurate calibration, use the ClockSync app (available on Google Play), which supports manual adjustment to millisecond accuracy.
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On the Xiaomi Mi 9 with MIUI 12+, time is synchronized not only over NTP, but also through Xiaomi servers. If you use a VPN or a modified hosts file, this can block the time update.