Seeing a "SIM Not Provisioned" error on your Nothing Phone (2) is a real roadblock, cutting you off from calls and data. This message means your phone can't properly register your SIM card with your mobile network, so it's essentially a fancy Wi-Fi device until you fix it.
Before you do anything drastic, try the quickest fix first. Pull down from the top of your screen twice to open your quick settings and tap the airplane icon. Wait about 30 seconds, then tap it again to turn airplane mode off. This forces your phone to drop and re-establish its connection to the cellular network, which can clear up a temporary glitch.
Restart Your Nothing Phone (2)
A simple restart is often all it takes. Just press and hold the power button on the right side of your phone until the power menu appears, then tap "Restart." If the screen is unresponsive, you can force a restart by holding that same power button for about 10 seconds until you feel a vibration and see the Nothing logo.
This clears out any software hiccups that might be preventing the SIM from being recognized properly. I'd start with this one, as it's solved the issue for me more times than I can count on various Android phones.
Check Your SIM Card Activation and Account
If this is a brand new SIM card you just got in the mail or from a store, it might not be activated yet. You'll need to contact your carrier (like T-Mobile, Verizon, or AT&T) to have them flip the switch on their end. This is the most common reason for this error with a new line of service.
For existing lines, your service could have been suspended. If you're on a prepaid plan, check that you have a positive account balance. For postpaid plans, make sure your bill is paid. A quick call to your carrier's customer service or a check of their app will give you the answer.
Reinsert the SIM Card
The SIM tray on the Nothing Phone (2) is located on the bottom edge. Grab the little SIM ejector tool that came in the box (a paperclip works in a pinch) and gently push it into the tiny hole. The tray should pop out.
Carefully remove the SIM card and take a look at the gold contacts. If you see any dust, lint, or corrosion, gently wipe them with a soft, dry cloth. Blow any debris out of the SIM tray slot as well. Reinsert the SIM, making sure it's seated firmly and oriented correctly, then push the tray back in until it clicks.
Manually Select Your Network Operator
Sometimes the automatic network selection gets confused, especially if you're in an area with spotty coverage or near a border. You can manually tell your phone which carrier to use.
Go to Settings > Network & internet > SIMs. Tap on your active SIM, then tap Network operators. Turn off "Choose automatically," wait a moment for the list to populate, and then select your carrier's name from the list that appears.
Update Your Phone's Software
Software bugs in Nothing OS or the underlying Android system can sometimes cause connectivity issues. Making sure you're on the latest version is a good step.
Head to Settings > System > System update and tap "Check for update." If an update is available, download and install it. It's a good idea to be connected to Wi-Fi for this, and I'd recommend doing it before moving on to more invasive fixes like a network reset.
Update Carrier Services
This is a specific Android app that helps manage communication between your phone and your carrier's network. An outdated version can lead to provisioning errors.
Open the Google Play Store, tap your profile icon in the top right, and go to Manage apps & device. Under "Updates available," look for "Carrier Services." If you see it, tap "Update." If you don't see it listed, it means you already have the latest version.
Reset Your Network Settings
This is a more thorough step that will wipe all your saved network information. You'll lose saved Wi-Fi passwords, paired Bluetooth devices, and any custom mobile network settings, so be prepared to re-enter those.
To do this, go to Settings > System > Reset options. Tap on Reset Wi-Fi, mobile & Bluetooth and confirm. Your phone will reboot. After it comes back on, you'll need to reconnect to Wi-Fi and re-pair your Bluetooth accessories, but it often clears stubborn network glitches.
Try the SIM Card in Another Phone
This test helps pinpoint where the problem actually lies. If you have access to another unlocked phone, power it off, insert your Nothing Phone (2)'s SIM card, and turn it on.
If the SIM works perfectly in the other phone and gets service, then the issue is likely with your Nothing Phone (2) itself. If the other phone also shows a "Not Provisioned" error or gets no service, then the problem is almost certainly with the SIM card or your carrier account.
Contact Your Mobile Carrier
If you've tried everything here and the SIM still isn't working, it's time to call in the experts. Your carrier's support team can look at your account on their end to see if there's a provisioning error, a network outage in your area, or if the SIM card itself has failed.
They can often run remote diagnostics and, if needed, mail you a replacement SIM card. When you call, let them know the specific error message and all the steps you've already tried, it'll help them solve the problem faster.
