Galaxy S7 not connecting to home wifi, won’t connect to laptop via USB cable, other issues

One of the annoying problems any smartphone user can encounter is when you’re unable to connect to your own wifi. In this post, we discuss a #GalaxyS7 user’s problem on connecting to her home wifi. Hopefully you’ll find our solutions helpful.

If you are looking for solutions to your own #Android issue, you can contact us by using the link provided at the bottom of this page.

When describing your issue, please be as detailed as possible so we can easily pinpoint a relevant solution. If you can, kindly include the exact error messages you are getting to give us an idea where to start. If you have already tried some troubleshooting steps before emailing us, make sure to mention them so we can skip them in our answers.

Below are specific topics we’re bringing for you today:

Problem 1: Galaxy S7 won’t connect to laptop via USB cable

I have a Samsung Galaxy S7 that will not connect via USB connection to my HP Laptop. When I plug the USB into laptop I get the following message: “One of the USB devices attached to this computer has malfunctioned and Windows does not recognize it.”

I have been online with Samsung Tech Support 3 days in a row, changed the USB cable 10 times, had Samsung connect to the phone and make some changes and still getting the same error message. Connecting my phone is much easier for me to get the things I want off of there rather than trying to see everything very tiny and make out what it is.

Also my “tethering” icon is grayed out and I can’t seem to get it turned on! Samsung had me plug my tablet in to Laptop and it came right up..the same with Kindle Fire but 3 month old Galaxy S7 won’t budge…Pretty much self taught on the PC so getting real technical with me scares me 🙂 Thanks. — Joan Hobeck

Solution: Hi Joan. An issue like this can usually be blamed on the computer but since you mention that another unrelated connectivity function (tethering) is also acting up, we would like to think that there may something wrong with the phone. We suggest that you do a factory reset to ensure that your phone’s software is fresh and there are no possible third party app that may prevent solid USB connection to a computer. To factory reset your phone, follow these steps:

  1. Turn off your Samsung Galaxy S7.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. Using the Volume Down key, navigate through the options and highlight ‘wipe data / factory reset.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes — delete all user data’ using the Volume Down key and press the Power button to select it.
  8. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

After you’ve factory reset your S7, make sure that you don’t install anything to it. You want to try to connect your S7 to your HP laptop while it’s running a clean version of Android. If the laptop still fails to detect your S7 even in this state, you can then try to begin some troubleshooting your PC.

In your laptop, make sure that install the right set of drivers to allow it to detect your phone. Kindly visit this page and click on the link that says SAMSUNG_USB_Driver_for_Mobile_Phones.zip (15.3MB). Once the download is completed, install the Samsung drivers.

Afterwards, follow the steps below on how to install Samsung Smart Switch in your computer:

  1. Open the internet browser on your computer and visit the installation page for Smart Switch
  2. Click on the appropriate download link at the bottom (Samsung Smart Switch for PC).
  3. Click to launch the downloaded .exe file (.dmg on Mac).
  4. Confirm that you accept the terms of the license agreement by clicking the two check boxes.
  5. Click Next.
  6. Complete the installation process by clicking the Finish After that, the newly installed Smart Switch app will run automatically.

Now that you have the right drivers and Samsung Smart Switch installed, your computer should be able to detect your S7.

Problem 2: Galaxy S7 not connecting to home wifi

Hi. My phone isn’t connecting to wifi at home. It’s been working fine until I got back today and it won’t reconnect. I’ve tried restarting it, turning it off and leaving it for a while, putting it on safe mode but it still isn’t working. I’ve had the phone little over a month now and I don’t understand what’s wrong with it and was wondering if you could help. Thanks. — Lauren

Solution: Hi Lauren. Your issue may be caused by a simple phone bug, or by your local home network.

Do a sequential powercycle

The first thing that you want to do here is to ensure that you do the basics. Everytime you encounter problems connecting a device in a network, a must do but simple step is reboot. Be sure that you reboot everything — modem, router, and your S7. Be sure that you reboot the devices sequentially — turn on the modem first, followed by the router (if you have a separate router from the modem), then your S7. Be sure to allow each device to initialize everything before turning on the next. For example, let the modem stand after powering it on for at least a minute before turning on the router and/or your phone.

Verify if your wifi is working

Once you’ve done the sequential powercycle and your S7 still fails to reconnect, make sure that you check if it’s a wifi issue or not. There are two ways that you can do to achieve this but the easiest is by connecting another device, like a laptop or another phone. If it connects to your wifi without any problems, then that means that the problem is most probably isolated to your S7.

Alternatively, you can also bring your phone somewhere and see if it connects to a different wifi network.

Forget the network

If you’ve verified that you wifi is working after testing if another device can connect to it, your next troubleshooting step is to ensure that you refresh the connection. This is done by tapping on the name of your wifi in the list and clicking on FORGET. Once you’ve done that, reconnect your S7 to your wifi network and see how it works.

Refresh the system cache

Sometimes, installation of Android and app updates can corrupt the system cache so it’s good if you can also refresh it. A corrupted system cache can lead to all sorts of problems. To minimize cache-related issues, be sure to wipe the cache partition regularly. This procedure can be done easily and safely so you don’t need to create a backup for your files. Here’s how to do it:

  1. Turn off your Samsung Galaxy S7.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. Using the Volume Down key, navigate through the options and highlight ‘wipe cache partition.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes’ using the Volume Down key and press the Power button to select it.
  8. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

Verify if your router is blocking specific devices from connecting

If you are not the administrator of your home wifi, it’s possible that your device may be blocked from connecting in the first place. Make sure that you talk to the administrator so he or she can check the system, or unblock the device.

If you are the sole administrator of your home wifi, contact your internet service provider so they can walk you through the steps on how to check for blocks in your router.

Wipe the phone via factory reset

The next logical troubleshooting step at this stage is factory reset. Wiping your phone gets rid of bugs and glitches that may have developed over time. Refer to the steps above on how to factory reset your S7.

Problem 3: Galaxy S7 can’t receive MMS due to poor internet service

Have Galaxy S7 with Consumer Cellular (T-Mobile) & while I have no problem receiving text messages I’m not receiving MMS pics. I’ve checked all my settings per your instructions to no avail…all I get is “message not found.” I have a VERY weak signal so use wi-fi calling…could this be the problem? — Joanmerriam1

Solution: Hi Joanmerriam1. MMS requires data connection, which means that you must have a good cellular connection for your internet. Some carriers also don’t turn on MMS on their customer’s account by default so you want to verify if your account is set up properly to send and receive MMS.

And no, MMS doesn’t work on wifi or wifi-calling. For first hand information how MMS work on their end as well as the requirements for it to work, contact your carrier’s technical support team.

 


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