Galaxy S7 keep forgetting wifi network credentials at work, not recognized by PC, other connectivity issues

Hello Android fans! We welcome you to yet another post that provides solutions to some #GalaxyS7 issues. As usual, these issues are taken from mails we received from some of you so hopefully this article won’t only address problems of those mentioned here but also others who may be experiencing similar troubles.

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 not recognized by PC when connected via USB

When i connect my phone to PC, I get a USB device not recognized error. i used to be able to export to this PC but after a recent Android update i haven’t been able to anymore. I have had an IT guy check the computer and there is no reason it shouldn’t recognize it on that end since all the drivers it should need are there.

I have used the original cord and other cords and same problem. i have done a soft reset. after plugging to computer i have pulled the top menu down where it says charging and before it would have the option to transfer files or import pics but since the update i no longer have that option. It only takes me to the battery info. I have tried going to developer options/usb configuration and try to change to PTP but it won’t change (currently on MTP). — Paul Solano

Solution: Hi Paul. Windows machines (we assume you have Windows instead of Mac although the same things we’re saying can also be applied to the latter) must have the necessary configuration files (drivers) for its hardware and software in order to establish a connection with a non-Windows device like your Samsung Galaxy S7. Normally, drivers needed for known devices like Samsung devices come pre-loaded in updates. You can also get them by allowing your Windows PC to search for the correct drivers in the internet once you’ve plugged in your S7 to it. If you are 100% sure that your PC runs the latest operating system version and has all the drivers needed, then you should focus your troubleshooting on your S7.

Before you change anything drastic in your phone, make sure that you try to plug it in to another computer. If it still won’t connect to the second Windows PC, that’s a clear indication that something’s not right with your phone.

Samsung Smart Switch

The easiest way to move files to and from a computer connected to your phone is via Samsung Smart Switch app. Simply install the program in your computer (it will also update the drivers) and see if it will help in reestablishing a connection. To install Smart Switch in your machine, kindly do the following:

  1. Open the internet browser on your computer and visit the installation page for Smart Switch app.
  2. Click on the appropriate download link:
    1. For PC
    2. For Mac
  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 button. After that, the newly installed Smart Switch app will run automatically.

Hopefully, once you’ve installed Smart Switch, your PC will again start detecting and recognizing the phone. If that won’t work though, you must the next possible solution.

Wipe the phone with factory reset

Since you’ve mentioned that you’ve already tried the basic software troubleshooting stuff, we recommend that you wipe the phone clean via factory reset. This is a necessary step when dealing with post-update issues. We can’t see any reason why Android update will prevent it from connecting to a Windows machine but since it happened, you must do a drastic measure like factory reset.

To factory reset your S7, kindly do the following 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.

Factory reset should return all software settings to their defaults. As Galaxy devices are allowed to connect to Windows machines without hitch by default, factory reset should fix the problem. If that won’t work either, you must go back to your computer and troubleshoot it as well.

Problem 2: Galaxy S7 keep forgetting wifi network credentials at work, always asking to enter wifi login credentials

A previous Android phone would remember the login details for the wifi at my workplace, which uses a web login guest wifi system. This new phone requires me to enter the network (it will pop up the network name when I’ve put the first letter) and the full password every time I reconnect. How do I make it remember and default to the network name and password, so I can just press “OK” like the old phone did? — Peter English

Solution: Hi Peter. The Galaxy S7 is set to remember wifi networks and their corresponding passwords by default. If the phone keeps telling you to enter your workplace network credentials, that can only mean two things. One is that the wifi network may be set to ask for new authentication session every time a new device tries to connect. It may be a new system in place that coincided with your phone replacement. Second is that your phone’s operating system or system cache may not be working right.

To see which of these two is causing the issue, first you must talk to your IT department and confirm if our first suspicion is true. Remember, not all wifi networks are set up the same way so there’s a chance that there may be a new system put in place to increase security. If your IT guys will confirm that your phone is supposed to remember the network credentials once you’ve entered them the first time, then that means that the problem is phone-related.

Wipe the cache partition

To troubleshoot the phone, first you must make sure that the system cache is refreshed. This is done by doing the following 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 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.

Once you’ve refreshed the cache, try connecting and disconnecting from your work wifi and see how it goes.

Keep wifi on during sleep

Some users were able to fix a similar problem before by making sure that Keep wifi on during sleep option is enabled all the time. If you haven’t tried it yet, here’s how to turn it on:

  1. Connect to your work wifi.
  2. Pull down the status bar.
  3. Press and hold the wifi icon.
  4. Tap ADVANCED.
  5. Tap Keep Wi-Fi on during sleep.
  6. Select Always.

Do a factory reset

If nothing changes and the problem remains, don’t hesitate to factory reset the device. Check the steps above on how to do it.

Problem 3: Galaxy S7 apps won’t connect to the internet when not in wifi network

So when I am home, I am able to get wifi using our network. However, when I go and try to use my internet in public my apps like pinterest won’t work. i can’t get on the internet and social media apps like Snap, Instagram and Facebook won’t work either. Sometimes even my messages lag when sending them. This occurred before the update install. I’m not sure what my Android version is. — Mia

Solution: Hi Mia.There are two types of connections in your phone that will allow you to connect to the internet — mobile data and wifi. Wifi is usually stationary and has limited range. If you leave your house and go somewhere else, your phone won’t be able to connect to the internet unless it’s set to automatically turn on mobile data.

Mobile data is not a free service and must be activated with your carrier first. If you don’t have mobile data in your current subscription with your carrier, you should contact them so they can enable it. Be sure to ask them what your monthly data allowance is so as not to pay extra if you go beyond the limit.

If you already have mobile data enabled in your phone even before contacting us, then your problem about lag is probably due to slow mobile data connection. Make sure that your phone is set to the fastest network type available. To do that, follow these steps:

  1. Open Settings app.
  2. Tap Connections.
  3. Tap Mobile networks.
  4. Tap Network mode for the right SIM (if you have a Galaxy S7 Dous model) and select LTE/3G/2G/ (auto connect). Some Galaxy S7 models may have slightly different options but try to select 4G/LTE or 3G. 4G/LTE is the fastest so pick that if it’s included in the options.

If your phone continues to experience slow connection problems when on mobile data connection, you must talk to your carrier about it.

If the lag problem only occurs when using or loading a particular app though, wiping its cache or data may help. Below are the steps on how to wipe the cache and data of an app:

  1. Open the Settings menu either through your notification shade (drop-down) or through the Settings app in your app drawer.
  2. Navigate down to “Apps”. This may be renamed to something like Applications or Application Manager in OEM skinned versions of Android 6 or 7.
  3. Once in there, look for the application and tap it.
  4. You’ll now see a list of stuff that gives you information about the app, including Storage, Permissions, Memory Use, and more. These are all clickable items. You’ll want to click on Storage.
  5. You should now clearly see the Clear Cache and Clear Data buttons for the application.

Also, make sure that all apps are up-to-date by checking Play Store app. Lag can sometimes be an indirect result of problems with other unrelated apps or services so keeping all apps updated may minimize issues.