If your iPad Pro M5 shows "Not Registered on Network" or "No Service" after inserting a SIM or activating an eSIM, you're locked out of cellular data, calls (if using FaceTime or carrier calling), and SMS. This error means the iPad can't authenticate with your carrier, even though it might show signal bars. Before you assume the hardware is faulty, try these fixes in order. Most of them resolve the issue without a trip to the Apple Store.
Force Restart the iPad
A force restart clears temporary glitches without erasing any data. On the iPad Pro M5, press and quickly release the Volume Up button, then press and quickly release the Volume Down button, then press and hold the Top button until the Apple logo appears. Let the iPad boot completely and check if the network error is gone. This forces the cellular modem to reinitialize and attempt a fresh registration with your carrier.
Toggle Airplane Mode
Turning Airplane Mode on and off forces the iPad to disconnect and reconnect to the cellular network. Open Control Center by swiping down from the top-right corner of the screen, tap the airplane icon, wait about 10 seconds, then tap it again. This triggers a new registration handshake with the tower and often clears transient errors.
Check Your Carrier Account Status
Sometimes the problem has nothing to do with the iPad. An expired prepaid data plan, a past-due bill, or a suspended line will produce the same "not registered" error. Log into your carrier's app or website from another device, or call customer service. Confirm your account is active and that your iPad's IMEI or eSIM is properly associated with the line.
Remove and Reinsert the Physical SIM or Re-add eSIM
If your iPad Pro M5 uses a physical nano-SIM, eject the SIM tray with a paperclip or SIM tool, gently remove the card, and inspect it for dirt or damage. Blow on the tray and the SIM, then reinsert it firmly. For eSIM models, go to Settings > Cellular, tap the plan you want to remove, choose Remove Cellular Plan, then re-add it using the QR code or manual details from your carrier. This resets the device's link to the carrier's database.
Reset Network Settings
Resetting network settings clears saved Wi-Fi passwords, Bluetooth pairings, and cellular configurations without deleting your apps or data. Go to Settings > General > Transfer or Reset iPad > Reset > Reset Network Settings. Your iPad will restart and attempt a clean connection to your carrier. You'll need to reconnect to Wi-Fi afterward, but this step resolves a surprising number of registration failures.
Manually Select a Network Operator
Your iPad may be trying to connect to a network that isn't available in its current location. Go to Settings > Cellular > Network Selection and turn off Automatic. Wait a moment for the list of available carriers to appear, then tap your carrier's name. If the iPad registers immediately, the automatic selection was picking an incompatible or congested tower.
Update iPadOS and Carrier Settings
Apple and carriers release updates that fix network registration bugs. Go to Settings > General > Software Update and install any pending iPadOS updates. After the update, go back to Settings > General > About. If a carrier settings update is available, a prompt will appear asking you to tap Update. Both updates can patch known issues that cause the "not registered" error.
Change Cellular Data Mode
Sometimes the iPad sticks to a 5G band that isn't working properly. Go to Settings > Cellular > Cellular Data Options > Voice & Data and switch from 5G On to 5G Auto, or drop to LTE. After changing, wait 30 seconds and test the connection. If the iPad registers on LTE, the problem is with local 5G coverage or a carrier-specific 5G bug.
Try a Different SIM or eSIM Profile
A damaged SIM card or a corrupted eSIM profile can cause persistent registration failures. Borrow a working SIM from a friend's iPad or phone (if your model has a physical slot) and insert it. If the borrowed SIM connects, your original SIM or eSIM is defective. For eSIM, ask your carrier to issue a new QR code or activation code and set up a fresh profile. If the borrowed SIM also fails, the issue lies within the iPad.
Factory Reset as a Last Resort
A factory reset wipes everything and restores the iPad to its out-of-box state. Back up your data first using iCloud or a computer. Go to Settings > General > Transfer or Reset iPad > Erase All Content and Settings. After the iPad restarts, set it up as new (don't restore from a backup yet) and check if the network error clears. If the error persists even after a full wipe, the cellular modem or antenna is likely faulty, and you should contact Apple Support for service.
