The newly launched Google Xiaomi 15 Ultra is the top flagship model by Google under the Pixel family at the time of writing this article. It includes a fully redesigned overview, a new camera setup, Android 13 out of the box, and a more powerful in-house Tensor chipset. However, it seems that there are a bunch of bugs or issues troubling Xiaomi 15 Ultra users since its launch. Meanwhile, users are reporting about the Xiaomi 15 Ultra No Service or No Network issue. There are endless numbers of bugs or issues appearing to the Xiaomi 15 Ultra users from slower fingerprint unlock or fingerprint unlock not responding, selfie camera blur issue, random screen wakeup issue, Google Asisstant quick phrase not available, Magic Eraser not working, and more. Additionally, the missing face unlock feature, app crashing or freezing, screen flickering & green tint issue, etc are also bothering users a lot.
Currently, the affected users are storming the Xiaomi 15 Ultra Phone Help forum about the same issue and it seems that it’s a widespread problem for sure. According to multiple reports, the device service drops the network connectivity or signal quite frequently no matter which carrier service they’re using. It basically shows “NO SERVICE” or “NO SIM” status at the status bar (in the top left corner) every time of the lock screen and in the top right corner generally.
Whereas the signal strength area basically shows an exclamation mark (!) that indicates the device system can’t actually detect or find out the SIM card network whatsoever. Only after rebooting the device, the network connectivity restores temporarily which is a major issue for the Xiaomi 15 Ultra users. Although the system says “NO SIM”, it can still detect the inserted SIM in the Settings app > Network and Internet > SIMs section which is quite weird.
Meanwhile, some affected Xiaomi 15 Ultra users have tried the following steps to troubleshoot the issue manually but these didn’t help at all. Even after inserting a new physical SIM card or an eSIM, the issue persists. Whereas performing the factory reset method on the device didn’t help either. We’re expecting that Google should gonna resolve the problem in their next update soon. Till then you can try following the methods below to check if that helps or not.
Method 1. Reboot the Device
We can understand that rebooting the device may not work for everyone and every time but it’s worth trying at least once if you’re facing any kind of connectivity issues or frequent drops whatsoever. It doesn’t require any extra effort or time so you can try it out. Just long-press the Power button on the Xiaomi 15 Ultra and the Power menu will appear. Simply tap on Restart to automatically reboot the system on the device.
Method 2. Disable Adaptive Connectivity
By turning off the Adaptive Connectivity feature on your Google Xiaomi 15 Ultra device, you’ll be able to fix the conflict with the mobile network. This feature can automatically detect and decide which mobile network is having the best service or signal from 4G & 5G every time. So, it can automatically switch between a stable and stronger mobile network for improved user experience. Whereas it can also switch to 4G to preserve battery when required.
Make sure to go to the Settings menu on your Xiaomi 15 Ultra.
- Now, tap on Network and Internet > Scroll to Adaptive Connectivity.
- Make sure to turn off the toggle next to it.
- Once done, reboot the device, and check whether the SIM connectivity issue has been fixed or not.
Method 3. Reset Network on the Device
If none of the methods worked for you, try performing the network reset on your Xiaomi 15 Ultra model to check if the problem is still bothering you or not. To do so:
- Go to the Settings menu on your Xiaomi 15 Ultra.
- Go to System > Scroll down to Reset Options and tap on it to open.
- Now, tap on Reset Wi-Fi, mobile & Bluetooth > Tap on Reset settings at the bottom.
- Wait for the reset process to complete. Once done, reboot the device to apply changes immediately.
- You should remove and insert the physical SIM card again to get it detected easily. In some scenarios, this method may fix the SIM card-related issues.
Xiaomi 15 is a series of Android-based smartphones manufactured by Xiaomi. It succeeds the Xiaomi 14 series and introduces advancements in display technology, camera system, and performance. The devices run on Xiaomi HyperOS 2, based on Android 15, and are powered by the Qualcomm Snapdragon 8 Elite chipset. The Xiaomi 15 and Xiaomi 15 Pro were introduced on October 29, 2024, while the Xiaomi 15 Ultra was introduced on February 27, 2025. The global versions of the Xiaomi 15 and Xiaomi 15 Ultra were announced on March 3, 2025 at MWC and feature eSIM support and smaller batteries compared to the Chinese counterparts.
AND NOW I THINK ALL ISSUES AS WELL AS PROBLEMS REGARDING Xiaomi 15 Ultra HAS BEEN SOLVED . IF IN CASE YOU HAVE ANOTHER NETWORK ISSUE THAT I HAVEN’T DISCUSSED YET, THEN COMMENT US BELOW.
Version note: Android 11, Android 12, and Android 13 are older Android releases. Their presence in this guide is historical or relevant to a specific device/build; it does not indicate that Xiaomi 15 Ultra currently runs, qualifies for, or should be downgraded to that version. Check the exact model’s official software history before following version-specific steps.
