Method 1: Restart Your Pixel 7 Pro
The first fix you can do is restart your phone. Restarting your Pixel will fix most minor bugs in any device. Your Pixel will try to restart every service and setting, and your SIM might get detected during this process. Here is how you can restart your Pixel 7 Pro.

Method 2: Check Dirt On SIM Card
Many SIM cards are designed so that they may get dirty over time. So if your SIM card has any dust particles, glue, or debris, then your Pixel 7 Pro might not recognize it and throw SIM Card Not Detected or No Sim Card Error. So make sure your SIM card is clean, and check for any signs of damage. SIM card chips are very sensitive, any even a little scratch on them can disable/destroy them.
Method 3: SIM Card Status Check
Please check with your carrier provider regarding the availability of your SIM card since SIM cards may get temporarily reactive from your carrier if they have not been used in the last 90 days. This is a security mechanism to protect customers from potential fraud. So, connect your carrier and check if your SIM card is active.
Method 4: Reinsert Your SIM Card
If restarting your Pixel 7 Pro did not work, you can try reinserting your SIM card.
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Take out the SIM tray by using the tool provided in the box
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Clean your SIM card with the cotton clothes
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Insert your SIM card and wait for it to get detected.
Misaligned SIM cards can sometimes cause these types of problems with smartphones. If these steps do not work, you can try resetting your network.
Method 5: Reset Pixel Network Settings
Resetting your network will fix any outdated glitches that are causing issues. Here is how to reset your network.
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Open your settings, and go to System settings.
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Tap on the Reset option.
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Now tap on the Reset WiFi, mobile & Bluetooth option.

Method 6: Reset Device APN Settings
If your Pixel 7 Pro is still unable to connect to the network, resetting the APN might help. Here is how to do that.



Method 7: Boot Pixel In Safe Mode
If all these things are not helping and you are still in trouble with the sim card network error, Try booting your phone into safe mode. Going into safe mode will block all third-party apps automatically. Follow these steps to boot your phone into safe mode.

If everything functions as it should, one of your apps was probably the cause of the issue, so you’ll need to identify it. You can rely on your search by removing apps one at a time and checking to see if the problem persists after each removal.
After resetting your network settings, reconnect to your carrier’s network. Contact your carrier for more help if you still have trouble connecting or staying connected.
If all these steps do not solve your problem, you can contact the Pixel phones’ customer support. The Pixel support phone number is available here.
1-800-419-0157
Explain your problems to them. They will brief you on any extra solutions, pick up your phone, and drop it off after the service.
Conclusion
Having no network means being disconnected from all your friends and family living far away from you. You can fix the sim card error on your Pixel phone by following these steps. However, you can try extra steps while contacting customer support and hoping that this article was a help.