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Samsung Galaxy J7 Crown Troubleshooting (Part 2)

Samsung Galaxy J7 Crown troubleshooting here includes fixes for when the phone is unable to connect to Wi-Fi, has call / text problems, and many more.

Samsung Galaxy J7 Crown Common Problems

No phone is immune to problems, Samsung Galaxy J7 Crown included. It might work well one moment and several minutes later, you’d run into a glitch.

Phone issues are not exclusive to old devices only. Even when you have a brand new device, that doesn’t guarantee your phone to be free of any issue.

If you’re here from part one of this article, you’ve learned some common errors such as a frozen and unresponsive screen.

Here, we will learn some more about Samsung Galaxy J7 Crown troubleshooting methods. Especially, problems related to connectivity such as network and call issues. Enjoy reading!

How do I fix my Samsung Galaxy J7 Crown that won’t connect to the internet?

The following tutorial solves how to fix Samsung Galaxy J7 Crown that won’t connect to the internet:

  1. Connect to a different network. This is to ensure that the problem doesn’t originate from the current network you’re trying to connect. The router may be at fault. If you have access to it, you can try restarting the router.
  2. Enter the correct credentials. Make sure you know the password and enter it correctly.
  3. Connect under safe mode. Try to boot your device under safe mode. This is to check whether there’s a third-party app or firmware that causes this issue.
  4. Factory reset the phone. After trying everything but failed, your last option would be factory reset. It returns your phone to its original brand-new state. Make sure to back up everything before doing this procedure.

As a communication device, having access to the internet is a sign of a well-functioning device. But sometimes a phone could refuse to connect, for a mysterious reason. Do the Samsung Galaxy J7 Crown troubleshooting above to solve any Wi-Fi issue that occurs.

How do I block calls on my Samsung Galaxy J7 Crown?

This is the answer for how to block calls on Samsung Galaxy J7 Crown:

  1. Use the feature on the Contacts app. Open the “Contacts” app. Find the intended number on your contact list, tap “Details” then open the menu option (The three dots icon on the top right corner of the screen). Afterward, tap “Block Contact.” Lastly, tap “Block” to confirm.
  2. Block from the Phone app. Open menu option at the top corner of the Phone app. Tap “Block Numbers.” Here, you can activate “Block Unknown Callers” to block all unknown numbers. Or you can manually select a number from your contact list.
  3. Enable Samsung Smart Call. This special feature will inform you when an unknown number calls. To activate it, go to Settings > Advanced Features. Then tap the switch next to “Caller ID and Spam Protection.”
  4. Use a third-party app. A third party call-blocking app offers features native apps don’t have, such as detecting a spam number automatically. There are a lot of apps you can choose on the Google Play Store. Make sure to read the app’s description before installing it. Hence you’d install an app that suits your needs the most.

Not every incoming call is welcomed. Some times, we’d like a certain contact to not call us, such as annoying telemarketers. You can make your phone block unwanted calls. Follow the tutorial above so no unnecessary numbers will bother you anymore.

How do I block text messages on my Samsung Galaxy J7 Crown?

To prevent unwanted texts, here’s how to block text message on Samsung Galaxy J7 Crown:

  1. Use the Messages app. Open the Messages app. Tap on the little three dots on the top corner of the screen. Tap “Settings” then select “Block Messages.” Afterward, tap “Block List.” Here, you can either choose a contact or manually enter a phone number.
  2. Block only a specific number. On the Messages app, tap the conversation with a number that you want to delete. Open the menu by tapping the three dots on the corner of the screen. Here, tap “Block number” then tap “OK” to confirm.
  3. Register a spam number. This step applies to spam messages. Instead of blocking them, simply register the number as spam. In the future, messages for that number will go into the spam folder. Here’s how to do it: On the Messages app, tap and hold the message until the options menu pops up. Then tap “Register as spam number.”
  4. Block via a phrase from the text. Sometimes, spammers still manage to send you a text from different phone numbers. You have the option to block them based on the typical phrase they use (eg. company name or promotional words). To block, go to the Messages app> Option menu> Settings. Then tap “Register phrase as spam.” Enter the words or phrases you wish to censor. Then tick “Spam Settings.”

Just like calls, you can block unwanted texts on your phone. It’s pretty easy to do it. You can use built-in features or even a third-party app. Besides blocking, it’s also recommended to do preventative measures, such as not easily giving your phone number to other people.

How do I fix my Samsung Galaxy J7 Crown that won’t connect to Wi-Fi?

Check the following list on how to fix Samsung Galaxy J7 Crown that won’t connect to Wi-Fi:

  1. Perform soft reset. This helps get rid of bugs that may be causing the Wi-Fi issue.
  2. Wipe cache partition. If the problem persists, the bugs must be located where soft reset can not reach. Boot your phone into Recovery Mode and perform “Wipe cache partition.”
  3. Forget and reconnect. Disconnect from the Wi-Fi, then try to reconnect again. Don’t forget to enter the correct password if required. You may have logged on with outdated credentials, that’s why you can’t connect to a particular Wi-Fi network.
  4. Check the Wi-Fi router. Sometimes, the root of this issue lies in the network itself. If you have access to the Wi-Fi router, check if it’s working properly.

Wi-Fi problem is one of the common problems that frustrate people the most. But is also the most manageable issue that rarely requires professional help. Most people can fix it by themselves. And usually, it also doesn’t require much time and effort to fix it.

How do I fix “No Service” error on my Samsung Galaxy J7 Crown?

Read the instruction below on how to fix “No Service” error on Samsung Galaxy J7 Crown:

  1. Restart the phone. Basic turning off then turn the phone on again could work here. Try a restart before attempting to do another fix.
  2. Do APM-cycle. Turn on the Airplane Mode, then turn it off again. This way, your device detaches your phone temporarily from the cell tower, before attempting to make a connection again.
  3. Select the carrier network manually. An incorrect network could render your phone without service. Go to Settings > Mobile Networks > Network Operators. Let the phone scan for available networks. Finally, select your carrier from the list.
  4. Make sure the SIM is not faulty. Reinsert it to make sure it’s properly positioned in its tray.
  5. Dial service mode. Check whether or not the cellular radio is disabled. Dial *#*#4636#*#* then tap “Service Mode.” Find “Device Information” or “Phone Information”, tap to open. Tap “Run Ping Test.” Look at the bottom of the screen for radio data. If it’s disabled, activate it. Finally, restart your phone.

Don’t let a “No Service” ruin your day. This is a common bug even for other Android devices, no matter the brand and the carrier is. Being common, this issue is fairly easy to deal with. It could be as simple as restarting the device or checking the state of your SIM card.

How do I fix “Invalid SIM card” error on my Samsung Galaxy J7 Crown?

Outlined below is how to fix “Invalid SIM card” error on Samsung Galaxy J7 Crown:

  1. Check the placement of the SIM card. Inspect the placement of the SIM card on its slot. To make sure, try reinserting it and see what happens.
  2. Check your phone plan. An “Invalid SIM card” notification could mean an outdated service. Make sure you have an active card with an active plan.
  3. Restart the phone. Perform a restart on your phone. Aside from rebooting the phone in normal mode, you can also try safe mode. Safe Mode helps ruling out the possibility of firmware and app glitch.
  4. Toggle the airplane mode on and off. Your device might need a little nudge to catch the network reception. Turn on the airplane mode and then turn it off. The phone will make an attempt to capture a network signal again.
  5. Use Auto for network mode. Let your phone determine the network mode by itself. to do this, head to the Settings app, tap Mobile Networks > Network mode, and select the first option: “LTE/WCDMA/GSM (auto connect).”
  6. Manually choose a network operator. Sometimes, your phone may connect to an incorrect carrier. Go to Settings > More Networks. Tap “Network operators” option then select your carrier.

When you get an invalid SIM card notification, no need to worry. This is often easy to fix. One of the most common causes is the SIM card that’s accidentally slipped from it slot. That’s why we recommend you to check it first before moving to another solution.

How do I fix my Samsung Galaxy J7 Crown that can’t make outgoing calls?

These are the possible solution on how to fix Samsung Galaxy J7 Crown that can’t make outgoing calls:

  1. Reboot the device. As an initial fix, try restarting your phone and see if calling works well afterward. If this step doesn’t work, continue to step two.
  2. Boot in safe mode. Try to restart the phone in safe mode. If you can make a call under safe mode, it means a third-party app is responsible for the problem.
  3. Uninstall a recently installed app. Remember which app you installed shortly before the issue occurred. Uninstall that app and see if your phone goes back to normal.
  4. Check the service. Make sure that connection is not a problem. That you have a good signal and enough balance to make a call.
  5. Inspect your phone. Check if there’s any damage or your phone has just fallen. If you suspect hardware complication is behind this issue, you have no option than bringing your phone to a technician.
  6. Disable airplane mode. There’s a possibility that you left this feature even after you don’t need it. Pull the Quick Settings menu and tap the Airplane Mode icon to disable it.
  7. Re-insert the SIM card. Try taking out your phone’s SIM card and inserting it back again. A SIM card that isn’t placed properly can prevent the phone from making a call.

What is a phone if it can’t make a call? Yet there are plenty of reasons why a phone is unable to do its work. Listed above is a series of fixes. However, if you have tried all to no avail, try contacting your carrier customer service for assistance.

How do I fix my Samsung Galaxy J7 Crown that won’t receive incoming calls?

Apply the fix below on how to fix Samsung Galaxy J7 Crown that won’t receive incoming calls:

  1. Check the Airplane Mode. People won’t be able to call you when Airplane Mode is on. Turn it off by pulling the quick setting from the top of the screen, then tap the Airplane Mode icon.
  2. Turn off Do Not Disturb. Do Not Disturb is useful in some situation, such as a meeting. But sometimes, a user forgets to deactivate when he/she no longer needs this feature. Toggle your Do Not Disturb configuration on Settings > Sounds and Vibration, and turn off the feature.
  3. Forwarded calls. The call may get diverted to another number. Go to Settings > Call Settings > Call forwarding. Then tap “Voice Call”, check off the forwarding option for each number on your contact. Then, disable the forwarding number.
  4. Check your SIM Card. A faulty SIM card can give a lot of network issues, including the inability to receive a call. Make sure the SIM card is inserted properly on its slot and it has no damage.
  5. Make sure there is adequate signal reception. A poor network connection can make a call difficult to get through. Move to an area where network reception is better.
  6. Make sure the number isn’t blocked. You may have blocked the number. If this is the case, unblock the number using the same method/app when you blocked it in the past.

Mostly, a problem related to calls is caused by connection issues. Make sure you apply the solution above to make your phone working properly again. As a last resort, contact your carrier’s helpline.

How do I fix my Samsung Galaxy J7 Crown that can’t send and receive MMS?

To troubleshoot, here’s how to fix Samsung Galaxy J7 Crown that can’t send and receive MMS:

  1. Make sure you have an active service. Check your phone plan whether it includes MMS as part of the plan. Check your text balance. An adequate balance is required to send or receive an MMS. Lastly, check whether your plan is still within the active period.
  2. Move to a different location. Poor signal reception could result in the phone’s inability to send MMS. If you’re inside a building, move closer to the window to any open area.
  3. Inspect the SIM card. Check whether the SIM card is inserted properly on its slot. A slight dislocation can make the card not working. Also make sure there isn’t any scratch or damaged part on the SIM card.
  4. Unregister from iMessage. If you’re migrating from iPhone, make sure that you have unregistered from iMessage.
  5. Clear app cache for the Messaging app. A temporary file may cause your phone to unable sending/receiving MMS. Clean up the chance and try sending an MMS again.
  6. Update the software. An outdated operating system can prevent the MMS feature from working normally. Check for updates and if an update is available, download and install it on your phone.
  7. Wipe the cache partition. If wiping app cache didn’t work, you can try wiping cache partition through the recovery mode.
  8. Do factory reset. This is the last resort. If you’re sure neither the network or the hardware is the culprit, do a factory reset to return your phone to its original factory version.

There are a lot of reasons why a phone refuses to send MMS. The possible cause includes faulty hardware, from your phone to the SIM card. A connection problem may also be the culprit. Lastly, a software-related bug could also be a cause. Follow the fix above to get the root of the problem.

At this point, you will know what to do should a problem arises in the future. As we can see, it’s quite easy to tackle issues on phone related to the network and connection. No more panic when your phone suddenly refuses to call or connect to Wi-Fi.

Samsung Galaxy J7 Crown troubleshooting doesn’t end here. There is more to learn in part three.

Before going there, let us know what you think about this tutorial in the comment section below. Also, don’t forget to share on social media, and hit the Bookmark button if you want to save this article.

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