How To Fix Samsung Galaxy S9 No Cellular Signal

The #Samsung #Galaxy #S9 is a flagship phone released this year which has a similar physical design as he S8 yet comes with several hardware upgrades. This new model uses a polished Aluminum frame with Gorilla Glass on both the front and back. It sports a 5.8 inch Super AMOLED Infinity Display while under the hood is the powerful Snapdragon 845 processor combined with 4GB of RAM. Although this is a solid performing phone there are instances when certain issues can occur. In this latest installment of our troubleshooting series we will tackle the Galaxy S9 no cellular signal issue.

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.  

How To Fix Samsung Galaxy S9 No Cellular Signal

Problem: Hi, I have a galaxy S9, coral blue, I had bought it two months ago. Unfortunately the back glass was broken after two days only, I went to samsung customer service and due to the high cost I refused to change it there, so I bought a new glass online and I changed it myself, then after about two months my S8 get wet and after few days everything returned to normal except the GSM, it show me as its disabled, wifi and gps working well, sd card working well, I tried all the required to fix this issue but it still, I changed the sim cards, I reset the network setting, I tried to search for a network but it cannot find any network, I flashed a full official rom with factory reset, even I had opened the screw and I removed all the parts included the motherboard and I wiped it using Alcohol, again I took it to samsung customer service and they informed me after they check that motherboard should be changed, but the cost of motherboard will be more than the new mobile, so I need your help because my mobile works perfect right now except the GSM and I don’t want to lose it. Thank you and best regards…

Solution: Before performing any troubleshooting steps on this device make sure  that it is running on the latest software version. If an update is available then you should download and install it first.


Since this issue occurred after you replaced the back glass cover of the phone then it’s very likely that this is caused by a faulty hardware component. There’s also the possibility that this is caused by a software glitch which we will be troubleshooting right now.

Use a different SIM card

The first thing you should do is to check if the problem is caused by a defective SIM card. This can be done by inserting a SIM card that is known to work on another device into your phone. If the phone gets a signal then it’s either the SIM or an issue with your account that’s causing the problem.

Check if you are in an area with network coverage

You won’t get any GSM signal in your phone is you are in an area that does not have any coverage. If you are inside a building then, the basement for example, then your phone might not get a signal.Try going outdoors in an area that is known to have a good signal reception.

Reset the network settings

Performing this step will reset all data connections to its default factory conditions. The following settings will be made

  • Stored Wi-Fi networks will be deleted.
  • Paired Bluetooth devices will be deleted.
  • Background data sync settings will be turned on.
  • Data restrictive settings in applications that were manually turned on/off by the customer will be reset to the default setting.
  • Network selection mode will be set to automatic.

To perform a network reset

  • From the Home screen, swipe up on an empty spot to open the Apps tray.
  • Tap Settings > General Management > Reset > Reset network settings.
  • Tap RESET SETTINGS.
  • If you have set up a PIN, enter it.
  • Tap RESET SETTINGS. Once complete, a confirmation window will appear.

Check if the problem occurs in Safe Mode

There’s a possibility that an app you downloaded can cause this problem. To check if this is the case you will need to start the phone in Safe Mode as only the pre-installed apps are allowed to run in this mode.

  • Turn the phone off.
  • Press and hold the Power key past the model name screen appearing on the screen.
  • When SAMSUNG appears on the screen, release the Power key.
  • Immediately after releasing the Power key, press and hold the Volume down key.
  • Continue to hold the Volume down key until the device finishes restarting.
  • When Safe mode appears in the bottom left corner of the screen, release the Volume down key.

If you get a GSM signal in this mode then the problem could be caused by an app you downloaded. Find out  what app this is and uninstall it.

Perform a factory reset

In case the above steps fails to fix the problem then you should consider doing a factory reset. Take note that this will erase your phone data so make sure to make a backup copy before proceeding with this step.

  • Turn off the phone.
  • Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  • When the green Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  • Press the Volume down key several times to highlight ‘wipe data / factory reset’.
  • Press Power button to select.
  • Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  • Press Power button to select and start the master reset.
  • When the master reset is complete, ‘Reboot system now’ is highlighted.
  • Press the Power key to restart the device.

If the issue persists after a factory reset then this is most likely caused by a faulty hardware component. The best thing to do right now is to either have this repaired at a service center or if the cost of repair is to high then you should just get a new phone.