Seeing a "Not registered on network" error on your POCO X7 Pro is incredibly frustrating. You're suddenly left with a device that can't make calls, send texts, or use mobile data, turning a powerful phone into a Wi-Fi-only tablet. This error means your phone's unique identifier, the IMEI, isn't being properly recognized by your carrier's network.
You can quickly check your IMEI by opening the phone dialer and entering *#06#. If it shows "null," "unknown," or a string of zeros, that confirms the core of the problem. Before assuming the worst, work through these steps. I'd start with the simple ones, as they resolve the majority of these network registration glitches on HyperOS.
Perform a Force Restart
This is often the quickest fix. A force restart completely reboots the phone's system, including the cellular radio module. For the POCO X7 Pro, press and hold the Power button for at least 15 seconds. Keep holding it until you see the POCO or HyperOS logo appear on the screen. This clears temporary software conflicts that can prevent network registration.
Toggle Airplane Mode
Swipe down from the top of your screen to open the Quick Settings panel. Tap the Airplane Mode icon to turn it on, wait for about 10-15 seconds, then tap it again to turn it off. This action forces your phone's modem to disconnect from and then reconnect to the nearest cell tower, which can re-establish a clean registration handshake.
Re-seat Your SIM Card
Power off your POCO X7 Pro completely. Use the SIM ejector tool (or a small paperclip) to pop open the SIM tray on the bottom edge. Carefully remove the SIM card, inspect the gold contacts for any dirt or damage, and gently blow into the tray slot to dislodge dust. Reinsert the SIM card, ensuring it's seated firmly and correctly, then push the tray back in. Power the phone back on.
Verify Your Carrier Account
It's worth a quick check to rule out an account issue. An unpaid bill, expired prepaid plan, or a carrier-side service suspension will produce the same "not registered" error. Use another phone to call your carrier's customer service or log into your account via their website or app. Confirm your line is active and in good standing before proceeding.
Reset Your Network Settings
This clears all network-related configurations without touching your personal data. Go to Settings > Connection & sharing > Reset Wi-Fi, mobile networks & Bluetooth. Tap on the reset option and confirm. Your phone will restart. Afterward, you'll need to re-enter Wi-Fi passwords and re-pair Bluetooth devices, but it often resolves corrupted carrier settings causing the registration failure.
Manually Select Your Network
Sometimes the phone gets stuck trying to register on a specific network band. You can force it to search again. Go to Settings > SIM cards & mobile networks. Tap on your active SIM, then go to Preferred network type. Try switching from "5G" to "4G" or even "3G" temporarily. Also, go back and tap Choose network to manually select your carrier from the list instead of letting it choose automatically.
Update HyperOS Software
Xiaomi frequently releases updates for HyperOS that include fixes for connectivity and modem issues. An outdated system could have a known bug that's already been patched. Go to Settings > About phone > HyperOS version and tap the "Check for updates" button. If an update is available, install it using a stable Wi-Fi connection. The large 6000mAh battery ensures you have plenty of power for the process.
Clear the Phone Services Cache
The system app managing your cellular connection can accumulate corrupted temporary data. Navigate to Settings > Apps > Manage apps. Tap the three-dot menu, select "Show all apps," and find "Phone Services" in the list. Tap on it, go to Storage usage, and tap "Clear cache." Restart your phone afterward to see if the network registration succeeds.
Test with a Different SIM Card
This step helps isolate the problem. Borrow a known-working SIM card from a friend or family member (ideally on a different network) and insert it into your POCO X7 Pro. If the new SIM registers on the network immediately, your original SIM card is likely faulty or damaged, and you need a replacement from your carrier. If the new SIM also fails, the issue is with the phone itself.
Perform a Factory Reset
This is your last software resort. A factory reset will erase all data on your phone, so ensure you have a complete backup. Go to Settings > About phone > Factory reset. You can also use the hardware method by powering off the phone, then holding the Power and Volume Up buttons together to enter recovery mode. Use the volume keys to select "Wipe data/factory reset" and confirm with the power button. If the network error remains after a full reset, the issue is almost certainly hardware-related, such as a faulty antenna or modem component.