Solved Samsung Galaxy S9 No Signal When Trying To Send Text Messages

Welcome to another installment of our troubleshooting series where we aim to help our readers who own the #Samsung #Galaxy #S9 fix the issues that they are experiencing with their phone. This is the latest flagship phone of the South Korean company that sports the same design as its predecessor which is the S8 yet comes with several hardware improvements. 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 no signal when trying to send text messages issue and other related problems.

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S9 No Signal When Trying To Send Text Messages

Problem: I have an S9. After the most recent Samsung Software update, whenever I try to send a text message, it will say “no signal for mobile networks”, and will fail to send. It is not a problem with the phone or SIM card, as it worked perfectly immediately before the update. I have already tried clearing cache and data of messages app, but to no avail. The problem is that I have AT&T, but upon updating, it changed the provider setting to T-Mobile (which I don’t have anything on).Now I just need to reset that… somehow

Solution: It looks like the update changed some of the settings of the phone to the default T-Mobile.

The first thing you will need to do in this case is to make sure that the phone is using the correct message center number.

  • Tap Messages.
  • Tap the menu icon.
  • Tap Settings.
  • Tap More settings.
  • Tap Text messages.
  • Tap Message Centre.
  • Make sure that the number is set to +1.312.314.9810

Next, you should make sure that the phone is using the correct APN settings.

  • Open the Apps tray.
  • Tap Settings > Connections > Mobile networks > Access Point Names.
  • Reset your APN settings, tap Menu (3 dots) > Reset to default.
  • Verify and update the phone APN settings

The AT&T APN settings are as follows.

  • Proxy: Not set
  • Port: Not set
  • Username: Not set
  • Password: Not set
  • Server: Not set
  • MMSC:
  • MMS proxy:
  • MMS port: 80
  • MCC: 310
  • MNC: 410
  • Authentication Type: None
  • APN type: default,mms,supl,hipri
  • APN protocol: IPv4
  • Bearer: Unspecified

In case the above steps fails to fix the problem then I suggest that you backup your phone data then do a factory reset. Once the reset is complete make sure to check that the above settings are properly set.

S9 No Network Error

Problem: Galaxy S9 no network connection. At one point during the day I noticed no signal and don’t wear connection I thought it happens since it’s a T-Mobile network problem but by the end of the day rebooting the phone did not help the issue. I switch to using Wi-Fi to run my communication messaging app. Have a habit of leaving my phone in my back pocket so when I sat down where there was no Wi-Fi connection I felt the phone vibrating when I took it out I had connection and I had received some messages via cell network. Took it to a repair shop then describe the problem they were hesitant to work on it and confirm my thoughts of it being a mechanical issue with the motherboard or antenna cables took it back to T-Mobile and they verified that the SIM card was not the issue nor any network problems were evident. I’ve since have a loaner phone to use and ordered a replacement phone . my question is , since this is a mechanical issue would it be possible to have a list of possible components to try to Reflow on the board to maybe use this phone as a backup in the future for the sake of curiosity

Solution: The only way to know what exact component of the phone is not working anymore is to have it checked at a service center. Once the faulty component has been discovered then you can have it replaced with a new one in order to use your phone.

S9 No SIM Detected Error

Problem: S9  purchased “unlocked” from Best Buy. Use on AT&T for a month or two then switched to T-mobile.  Phone worked fine of T-mobile for months. Family member lost their iPhone and we loaned them the S9.  They bought new phone but forgot their unlock password for the S9. I lost my phone and wanted to use the S9.  Finally had to do a factory reset on the phone. Everything works fine EXCEPT it keeps dropping WiFi, I cannot sent messages or make phone call as ‘no SIM is detected’ (cellular network not available).  I tried your 5 possible “fixes” to no avail. I could not do the one where you change “Connectivity” as none of the “select cellular network” options were available (none in bold and would allow me to select that file. T-mobile carrier tried putting a new SIM card in…. still didn’t work. Any suggestions, it’s a great phone and like new, wish it would recognize my SIM card?

Solution: The best thing that you can do right now is a factory reset. Make sure to backup your phone data before doing the reset. In case the issue still persists then this is most likely a hardware related problem already in which case you will need to bring this to a service center and have it checked.

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