In present scenario, losing internet connectivity is like end of the world for all of us. Most of the features or apps run on internet. Many iPhone and iPad users have reported that their 3G or LTE connections are not working after upgrading to iOS 9. There are some basic troubleshooting methods by which this problem can easily be resolved.

The root of this problem is not yet identified; it seems to be a bug from Apple itself. There can be some really petty issues causing it or might be a serious hardware problem. We have listed down all possible ways to resolve 3G or LTE connectivity issues.

Mobile Cellular Data Not Working in iOS 9 on iPhone and iPad

Mobile/Cellular Data Not Working in iOS 9 on iPhone and iPad

If you have recently updated your iPhone or iPad to iOS 9 and facing similar issue, follow the step-by-step tutorial given below:

Check Whether Cellular Data is Toggled ON

This might seem to be one of the most stupid things, but there are chances that cellular data is disabled and we are seeking to get internet connectivity.

Step #1. Tap on Settings app → Tap on Cellular.

Cellular Settings on iPhone

Step #2. Toggle on the “Cellular Data”. Note that many iPhones have “Mobile Data” option in place of “Cellular Data”.

Turn On Cellular Data on iPhone

Step #3. In the same menu, scroll down to check if the apps (under USE CELLULAR DATA FOR) are toggled on as well.

Turn ON Apps for Mobile Data

Toggle on the Airplane Mode

Step #1. Tap on Settings app.

Step #2. The very first option is “Airplane Mode”. Toggle it on.

Step #3. After 10-15 seconds, toggle it back off.

Turn On Airplane Mode on iPhone

Alternatively you can toggle “Airplane Mode” from control center.

Toggle Airplane Mode from iPhone Control Center

This process will simply refresh the network and might solve the issue. But if this did not resolve your issue keep reading further.

Remove SIM and Restart

Step #1. Remove the SIM card from your iPhone or iPad.

Step #2. Turn off your iPhone/iPad.

Step #3. Insert SIM card again and restart your iPhone / iPad.

Toggle off the SIM PIN option

Step #1. Tap on Settings app.

Step #2. Scroll down a little and tap on “Phone”.

Step #3. Under Phone menu, tap on “SIM PIN”.

Step #4. If the option is toggled on, toggle is off.

Some carriers keep it on by default to restrict the data access. In case it is blocked by carrier, you will need to contact your service provider. Even if this process did not resolve you issue, we have many other ways to resolve the issue, so keep scrolling down.

Add service provider APN

You can either get the APN details from your service provider or you can search on Google, “Your service provider name”+APN. Once you have the APN details, follow the steps given below:

Step #1. Enter the Settings app → Tap on Cellular.

Cellular Settings on iPhone in iOS 9Step #2. Tap on “Cellular Data Network”.

Tap on Cellular Data Network

Step #3. Enter your APN.

Enter Cellular Data APN in iOS 9 on iPhone

Step #4. Exit to home screen and restart your device.

This should resolve your issue of internet connectivity; in case it didn’t, browse below for alternate options.

Cellular Carrier Update

Cellular carriers generally provide periodical updates to iPhones in order to enhance the connectivity over their network. Follow the steps given below to check if carrier update is available:

Step #1. Tap on Settings → General.

Tap on Settings Then General on Your iPhone

Step #2. In the list, very first option is “About”; tap on it.

Update iPhone Carrier Settings

Just wait for a few seconds, if any carrier updates are available; a small pop-up will appear on the screen with two options: “Not Now” and “Update”; tap on Update. Carrier updates are very nominal in size and does not take more than couple of minutes. So it is advisable to regularly check if any updates are available. Keep reading if you did not find any new update and your issue is still unresolved.

Update to Latest iOS

This might sound little confusing, but if you are not aware, the latest iOS 9 has already received a new update called 9.0.1. The new update generally contains minor bug fixes, you never know if the new update has fixed mobile data connectivity issue. Try updating your iPhone or iPad to latest iOS 9.0.1.

Step #1. Tap on Settings → General.

Tap on Settings Then General on Your iPhone

Step #2. Tap on “Software Update”.

Update iOS on iPhone

Step #3. Wait till update is completed, and then reboot your iPhone or iPad.

Even if that does not solve the cellular data issue please keep reading further.

Reset Network Settings

 From here on the processes are getting little tedious. Resetting Network Settings means to lose all Wi-Fi passwords and other network related settings. It’s a saying: when the going gets tough, the tough gets going. To reset network settings follow the steps given below:

Step #1. Tap on Settings → General.

Tap on Settings Then General on Your iPhone

Step #2. Scroll to the bottom and tap on Reset → Under Reset menu you will see “Reset Network Settings”. Tap on it and confirm by feeding your passcode.

Reset Network Settings on iPhone in iOS 8Step #3. Exit from Settings, hold the power button to turn off your iPhone or iPad.

Step #4. Wait for approximately 10-15 seconds and restart your phone.

Step #5. Enable the Cellular Data.

Check if you are able to get 3G or LTE connectivity, if not continue reading till bottom of this page.

Performing Factory Reset

Yes, you read it right. As none of the simple things solves the issue, this is one of the tasks, which is really annoying but works almost all the time. Before moving on to the factory reset, make sure you have backed up your iPhone or iPad completely. As after factory reset is done, there is no turning back.

Step #1. Backup your iPhone or iPad using iTunes.

Step #2. After the backup process is completed in iTunes, go back to your iPhone or iPad and enter the Settings app.

Step #3. Tap on General and scroll to the bottom of the menu.

Step #4. Tap on Reset.

Step #5. Tap on “Erase All Content and Settings” and enter your passcode to confirm the reset process.

Erase All Contents and Settings on iPhone

After factory reset is completed, you will have a kind of brand new iPhone or iPad. Just restore your backup and check if you are able to get 3G or LTE connectivity. If you are still not getting mobile data connectivity, then things are getting little scary now. Keep reading if the last option can resolve the cellular data connectivity issue.

Downgrade to iOS 8.4.1

If you had your 3G or LTE connectivity smoothly working before updating to iOS 9, then you can try downgrading back to earlier iOS again. Take a complete backup before downgrading to iOS 8.4.1 as you will lose all your personal data. Please note the backup you just took on iOS 9 won’t be compatible with iOS 8.4.1, it is just for security purpose. If downgrading does not resolve the issue, at least you have a window to return back to iOS 9 along with your personal data.

Check here for step-by-step guide on how to downgrade from iOS 9 to iOS 8.4.1.

Even after going through all the bumpy technical rides without any fruitful outcome, the only option we can suggest is to visit the nearest Apple store for technical assistance.

Share your feedback with us in comments, on Facebook, Twitter and Google Plus.