Solved Samsung Galaxy S9+ Will Not Stay Connected to Wi-Fi Network After Software Update

One of the best large screen premium smartphone that you can get in the market today is the #Samsung #Galaxy #S9+. This is the larger version of the S9 having a 6.2 inch Super AMOLED display. Because it is the larger phone it can also accommodate a bigger capacity 3500 mAh battery. While this phone shares similar components with the S9 what gives this model the edge is that it has a larger 6GB RAM as well as a dual 12MP rear camera system. Although this is a solid performing phone there are instances when certain issues can occur which we will be addressing today. In this latest installment of our troubleshooting series we will tackle the Galaxy S9+ will not stay connected to Wi-Fi network after software update issue and other related problems.

If you own a Samsung Galaxy S9+ or any other Android device for that matter then feel free to contact us using this form. We will be more than happy to assist you with any concern that you may have with your device. This is a free service we are offering with no strings attached. We however ask that when you do contact us try to be as detailed as possible so that an accurate assessment can be made and the correct solution can be given.  

If you would like to browse the previous parts in this series then check out this link.  

S9+ Will Not Stay Connected to Wi-Fi Network After Software Update

Problem: I did the latest software update on July 5 and now my phone (S9+) will not stay on wifi and keeps reverting back to 4g. I have tried turning off and restarting and a soft reboot. I cannot afford to operate my phone solely on 4g. I understand this problem is universal to most who performed this update. I am wondering what Samsung is doing to fix this issue and how long is it going to take. I am a loyal Samsung customer but find this glitch unacceptable.

Solution: If this issue is caused by a bug in the software then it will most likely be patched in another update which should be released soon. In the meantime you can check if another factor is causing this problem by performing the troubleshooting steps listed below.

  • Forget the Wi-Fi network from your phone. Do a soft reset then connect to your Wi-Fi network again.
  • Try checking if the same issue occurs when you connect your phone to a different Wi-Fi network. If it does not occur then the problem could be caused by an issue with your router.
  • Check if the issue occurs when the phone is started in Safe Mode. If it doesn’t then it could be caused by an app you downloaded. Find out what app this is and uninstall it.
  • Backup your phone data then do a factory reset.

S9+ Can’t Send Or Receive Multimedia Messages

Problem: My mom’s galaxy S9+ is unlocked from her previous carrier (Verizon) and brought it over to T-Mobile. Ever since she has not been able to send or receive multimedia text messages. We did something, reset the network settings, and even mimicked the APN settings from my galaxy s8 active from T-Mobile and now her phone won’t connect to the network data or send/ receive multimedia text messages. Please help! She’s older and not very open to a new phone because of price and technological advancements.

Solution: If the phone has an active mobile data subscription and the mobile data switch is turned on then this issue is most likely caused by a wrong APN setting.

Make sure that the APN setting of the phone are as follows:

  • Name: T-Mobile US LTE
  • APN:
  • Proxy: <Not set>
  • Port: <Not set>
  • Username: <Not set>
  • Password: <Not set>
  • Server: <Not set>
  • MMSC:
  • Multimedia message proxy: <Not set>
  • Multimedia message port: <Not set>
  • MCC: 310
  • MNC: 260
  • Authentication type: None
  • APN Type: default,supl,mms OR Internet+MMS
  • APN protocol: IPv6
  • APN roaming protocol: IPv4
  • Turn APN on/off: APN turned on
  • Bearer: Unspecified
  • Mobile virtual network operator type: None
  • Mobile virtual network operator value: <Not set>

S9+ No Mobile Network Signal

Problem: My network has gone out for hours here and there but Soft or hard resets would resolve the issue. My network has been out since Sunday 7/1/18 and as of 7/6/18 still no network. Went into a Sprint store to get it fixed and was told my Sim card tray was damaged after they replaced the my old SIM card. Sprint told the only way to fix it was to use my insurance ($275 deductible for a new phone SMH), I ordered a new Sim card tray and still the Sim card would not read. I’ve tried every single troubleshooting procedure that can be found. If you could help me and save me money it would be appreciated.

Solution: You should try removing the SIM card from your phone then insert a different SIM. This way you will be able to check if the problem is caused by a defective SIM card. You should also try to manually select your network form the phone settings.

  • Go to the Start Screen
  • Tap Settings
  • Tap Connections
  • Tap Mobile Networks
  • Choose Network Operators
  • Tap Search Now
  • Your phone should be searching for available networks
  • Tap on your carrier network

One last troubleshooting step that you can do is a factory reset. This allows you to check if a software glitch is causing the problem. Make sure to backup your phone data before doing the reset.

If the above steps fails to fix the problem then you should bring the phone to a service center and have it checked.

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Chad Buenaflor

Chad has been in the tech industry since 2000. He has a degree in Electronics Engineering and is interested in the hardware and software side of technology. Initially working for a Japanese semiconductor company as a Test Engineer for nearly 10 years, he then pursued his passion for internet technology by working for the support team of Time Warner Cable then finally joining TheDroidGuy as one of their troubleshooting and tech writers. On his free time he plays his favorite games on his PC, Xbox Series X, and Android phone. Contact me at Email

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