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Apple iPhone 6s Plus Network Connectivity Issues: searching for network, no service, failed to connect to cellular data network, and other network errors [Troubleshooting Guide]

Having trouble connecting to a network on your iPhone? Are you getting any error prompts like “Failed to connect” or pertinent errors? This content might be able to help you. Read on to learn how to deal with network problems on your iPhone 6s Plus.

Network errors are among the most prevalent concerns raised by many iPhone owners over the Internet, including those with the iPhone 6s Plus. The problem typically manifests while attempting to connect to a network but what you’re seeing on the screen are error prompts including “failed to connect,” “unable to connect to cellular network,” “no service,” “searching,” and the like. As a result, you cannot make or receive calls and messages on your device. So it’s like having a partially unusable iPhone.

Fortunately, majority of these errors are software-related. This means that there’s still a way for you to fix it on your end, without having to pay for a tech service. Nonetheless this option will only work if and only if there’s no damage to any of your iPhone components. In short, your iPhone 6s Plus is not hardware-damaged.

But before we jump right into our troubleshooting, if you have other issues with your iPhone, make sure you drop by our troubleshooting page because we’ve already addressed a lot of issues reported by our readers. Find issues that are similar with yours and use the solutions we suggested. If they don’t work for you or if you need more help, fill up our iPhone problems questionnaire and give us more accurate information about your problem so we can give you the best solution.

What makes your iPhone encounter network connectivity issues?

Network connectivity issues can occur to any device at any time, scheduled or unexpected. And the Apple iPhone 6s Plus is not exempted. Listed below are the most common triggers, which you might need to consider when dealing with network connectivity issues on your iPhone in the future.

  • Network outages – can be scheduled system maintenance conducted by your network provider or unexpected service disruptions. Network outages are likely to blame for most problems occurring suddenly.
  • SIM card issues – defected or damaged SIM card or improper SIM card installation can also give you trouble when attempting to connect to your network. Usually, you’ll be seeing relevant errors such as Invalid SIM card, No SIM card, and other SIM card errors on your iPhone.
  • Account issues – billing issues are causing the same problem to many iPhone owners. Some carriers would impose a soft disconnect or temporary suspension of services including those that are network-related until a payment is made on the account.
  • Software bugs – consist of program malfunctions and inconsistencies, corrupted contents, and malware. A fix patch is often required to eliminate software bugs but in minor cases, a soft or hard reset on the device might be able to help.
  • Incorrect settings – incorrect configuration of relevant options on your iPhone’s network settings menu can also give you the same trouble. Reverting the settings back to the previous configuration might be the best option. But if you’re not certain of which options or settings you’ve changed, you can resort to a network reset instead.
  • Hardware damage – rarely happens but possible especially if there were previous instances of hard drops or liquid exposure that might have resulted to a problem on the physical network components of your iPhone. Network problems that are hardware-related would already require a technician’s aide in order to get fixed. Otherwise, contact your iPhone carrier or Apple Support for other options.

If you are certain that the problem you are dealing with your iPhone 6s Plus network function is software-related, then you may go ahead and try the any of the recommended troubleshooting methods below.

How to fix network connectivity issues on your iPhone 6s Plus?

The standard approach in troubleshooting device issues is by looking into the underlying cause. This means that you need to look back to the time when the first symptom began to manifest on your iPhone. For example, what happened before this symptom appears? Did you make any changes to your iPhone settings or configured something on the network? Knowing what happens before the onset of the problem can help you fix it quickly. However, if that approach will not suit you, then a trial-and-error approach would be a better option to consider.

In order to assist you further in the latter, I have provided a rundown of all potential solutions and suggested workarounds used by other iPhone users to deal with network connectivity issues on their device. 

Note: Before moving any further, try to power cycle or reboot your wireless router or modem. To do so, just unplug the router/modem from the power source for at least 30 seconds, then plug it back in. Doing so will allow your router/modem to re-establish new connection from the network tower. Check the LED-indicator and make sure all lights appeared to be normal.

Feel free to give any of these methods a try and hopefully, you too can get positive results on your end.

Step 1. Check your account status.

Performing any troubleshooting may actually not be necessary especially if the problem is account-related. If you think this the reason why you are cannot use network services on your iPhone 6s Plus, then you should contact your carrier or service provider to check and verify your account status. If necessary, settle your balances or any account issues to restore all services.

Also check for any on-going maintenance or unexpected outages that might have caused temporary interruptions to network services in your area.

Step 2. Verify network settings on your iPhone.

Some features on your iPhone must be disabled for network services to work. Among the settings to look into (and configure, if necessary) are Airplane mode, Do Not Disturb (DND), Call Forwarding, and Blocked List (Restricted Contacts).

  • Airplane Mode – this feature must be disabled or turned off for network services to work properly on your iPhone. To verify if this feature is properly configured, go to Settings-> Airplane Mode. Make sure the Airplane mode switch is disabled or turned off. Toggle the switch from on to off, if necessary.
  • Do Not Disturb (DND) – when enabled DND might restrict network-related services to go through such as phone calls and messages. To configure this feature, go to Settings-> Do Not Disturb-> and then if necessary, toggle the switch to turn the DND feature off.
  • Call Forwarding – you might think that a network problem is causing your some troubles in getting incoming calls but it might just be the call forwarding feature on your iPhone that needs to be configured properly. You might have previously turned this feature on and forgot to disable it that’s why all your calls won’t go through your iPhone but rather forwarded to another device. To check on this feature, go to Settings-> Phone-> Call Forwarding-> disable or turn off switch.
  • Blocked List – you won’t be able to send or receive calls and messages to or from block-listed contacts. To make sure this is not causing you any trouble, head over to Settings-> Phone-> Call-> Blocking & Identification-> remove the contact from the list, if necessary.

Step 3. Update iPhone 6s Plus iOS to the latest version.

For network problems caused by software bugs, installing an update would usually fixed them. This is possible because software updates also contain fixes for certain bugs found on the existing iOS platform. When the update is implemented or installed, existing bugs will also likely be eradicated.

 

  • To check if an update is available for your iPhone, head over to Settings-> General-> About-> Software Update.

 

You should see a notification for available update. To proceed with iOS update downloading and installation, just follow the onscreen instructions.

Software updates can be installed wirelessly via OTA or manually through iTunes. The first option requires a stable wireless connection (Wi-Fi) while the seconds requires a computer with the latest version of iTunes program installed.

You may also need to update carrier settings if an update is available. Carrier settings update can also contain some fix patches for any network irregularities on an iPhone. These updates can also be viewed through the About section on your iPhone.

Just follow the onscreen prompts to complete the carrier settings update installation process.

Step 4. Remove and re-install SIM card on your iPhone.

There are times when the SIM card gets loose, which results to SIM card errors or other problems relevant to cellular data network access. If you are getting relevant errors while attempting to connect to a network on your iPhone 6s Plus, try to remove and then re-insert the SIM card.

But before you do so, be sure to power off your iPhone completely.

You will need a SIM eject tool or paper clip to pop the SIM tray out and so you can take out the SIM card. Be sure to secure the SIM card to avoid loose connections.

Turn your iPhone back on after you re-insert the SIM card and see what happens.

Step 5. Reset Network Settings on your iPhone 6s Plus.

If the problem remains even after performing all the aforesaid methods, at this point you should consider performing network reset.

Resetting the network settings on your iPhone would mean that your current network information will be erased as network settings and configurations are restored to factory defaults. This means losing your current network credentials including Wi-Fi password, VPN settings, and preferred networks. Thus, be sure to take note of this information before you begin.

Once you’re all set, go to Settings-> General->Reset-> Reset Network Settings.

Your iPhone will then reboot once the process is complete.

Step 6. Restore your iPhone as new.

This should only be considered a last resort, if all else failed to fix the network connectivity issue you have on your iPhone 6s Plus. Be sure to note that this process can take time to finish as everything on your device will be erased. As a result, you’ll get your iPhone same as brand new.

It is therefore recommended to back up your device before restoring. You can back up through iCloud or iTunes, as you would prefer.

Once everything is set, you may proceed with iPhone restore by going to Settings -> General-> Reset-> Erase All Content and Settings.

When the restore is complete, your iPhone will restart as new. You may then set up your device afterwards.

Contact Apple Support for More Help

If you have done every recommended workarounds in this post but to no avail, then I should now suggest contacting Apple Support for further assistance. It’s possible that a more advanced solution is required considering that you’ve already exerted all your effort in an attempt to fix the network connectivity problem on your end but still failed to resolve the underlying cause.

Connect with Us

If you have other problems with your iOS device including iPhone 6s, you may visit our Troubleshooting Page or complete and submit this form to get further assistance from our support team. Just be sure to provide us with all necessary information, such as your iOS device model, as well as more details about the issue you have with your device. For example, when did the problem start to occur or what you did before the problem shows. This way, it would be easier for us to determine the main cause(s) and help you towards finding the best possible solution available.

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