Are you switched from another carrier in your new or existing iPhone? Or upgrading your plan for the cellular data and facing difficulties on your device not finding cellular Data or Cellular network. Follow the below troubleshooting steps on fix 4G LTE not working. I found most of the users facing problem on due to miss configuration and Auto settings update send by carrier. Reset APN settings on iPhone 7 Plus primarily do and also follow the other fixing solutions in step by step.
APN settings are a basic rule defined by your carrier. So it must be accurate to use cellular data network on iPhone/ iPad. So that we can edit/ Update any time if your carrier allows.
Change or Reset APN settings on iPhone 7 Plus: iOS 10, 4G LTE Not working
Steps for Update or Reset APN Setting on iPhone 7/ 7 Plus
1: Go to the Settings app on iPhone/ iPad.
2: Next, Tap on Cellular > Cellular Data Options > Cellular Data Network.
Then, Make changes said by your carrier. You want reset and reconfigure it then scroll down on screen and tap on Reset Setting.
4G/ LTE not working on iPhone – Troubleshooting
1st: Check Cellular date
If you see Searching or not service at carrier single then make sure, Cellular data should be turn on
Go to the Settings > Cellular Data
You are outside the country then make sure about “Data Roaming” should be enabled. Go to the Settings > Cellular > Data Roaming toggle.
2nd: Restart or Force restart
Sometime, Carrier give facility for set APN settings by restart iPhone 7 or 7 Plus.
Restart your iPhone 7 (Press & Hold sleep/ Wake button) or Force restart iPhone 7 (Now Changed, Look here).
3rd: Check update for Carrie settings
Make carrier setting up-to-date, Go to the Settings > General > About. For available update you will see popup.
5th: Care about SIM
Take out your carrier SIM physically and Reinstall on iPhone. Make sure about any damage and crack.
6th: Reset iPhone 7 Network settings
Go to the Settings > General > Reset > Reset Network settings.
By reset network settings, all existing data from APN, VPN, Wi-Fi and Cellular credential automatically deleted.
Above all the setting based on preinstalled iOS 10, for old iOS version it should be same.
Contact your carrier and share your problem about it. They can remotely assist you and Point on actual problem.
Want more help or change/ Reset APN settings on iPhone 7 Plus, iPhone 7 with iOS 10. or 4G LTE not working share in comment how help above steps.