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Fix For Samsung Galaxy S4 Network Related Issues

Welcome to our focused troubleshooting series that deals with network related issues on the Samsung Galaxy S4. If you own this particular model and are having network related problems with the phone then you have come to the right place. We will tackle some of these issues in this post and provide the troubleshooting steps that needs to be done to resolve the problem. I strongly suggest that you bookmark this page in your favorite browser for future reference.

Samsung Galaxy S4

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S4 SIM Card Not Detected

Problem: Ever since I dropped my s4 phone (cracked screen) I have been having problems with it instructing me that sim card removed/can’t detect sim please reboot.every 10 minutes or so it’s been doing this. I had a tmobile employer put in a new sim and the same thing kept happening. Can u tell me why this is happening? Can I get a replacement or do I have 2 buy a brand new phone (different model)?

Solution: Placing in a new SIM is a good troubleshooting procedure since it allows you to isolate any SIM card related problems. Since the issue still persists after this then we know it’s not aSIM related issue.

The next thing you need to check is the SIM holder of your phone. Check if the gold contacts have any dirt or lint on them. Clean if necessary with an compressed air or a cotton bud dipped in alcohol.

Insert the SIM and check if it moves in the SIM holder. If it does then you need to ensure that it is secured tightly. To do this just cut out a piece of paper the size of the SIM card and place it on top of the SIM. This tightens the connection between the SIM and the SIM holder.

If the problem still persists then you should also eliminate any software related issues that may be causing this problem. To do this you need to backup your phone data then do a factory reset.

  • Turn off the device.
  • Press and hold the following three buttons at the same time: Volume Up key, Home key, Power key.
  • When the phone vibrates, release the Power key but continue to press and hold the Volume Up key and the Home key.
  • When the Android System Recovery screen appears, release the Volume Up and Home keys.
  • Press the Volume down key several times key to highlight ‘wipe data / factory reset.’
  • Press Power button to select.
  • Press the Volume down key until ‘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 problem still persists after this factory reset then it there may already be something wrong with the phone hardware. Bring your phone to an authorized service center and have it checked.

S4 Losing Network Signal

Problem: Hi, I have owned multiple s4’s and the most recent lost cell signal and 3/4g while I’m at home. It’s only happened since the 5.0.1 update so I was thinking may be you could give an idea as to what to do. I live in a rural area so it only got 1-2 bars before  but now I have nothing. I’m on Verizon also if that helps any. I’ve put in a new Sim card and reset the phone but I’m lost now. Any input would be greatly appreciated.

Solution: Does this issue only occur when you are at your home or does this issue occur in all locations you go to? If it only occurs in your home then there may be a problem with your network. Try to contact Verizon and inquire if there are any network related issues in your area.

If the network in your area does not have a problem then you should consider doing a factory reset since you mentioned this only occurred right after you got the 5.0.1 update. The problem may be caused by old software data that has not been completely removed from your phone and is causing a conflict with the new software. A factory reset will help resolve this issue. Just make sure to backup your data before proceeding.

  • Turn off the device.
  • Press and hold the following three buttons at the same time: Volume Up key, Home key, Power key.
  • When the phone vibrates, release the Power key but continue to press and hold the Volume Up key and the Home key.
  • When the Android System Recovery screen appears, release the Volume Up and Home keys.
  • Press the Volume down key several times key to highlight ‘wipe data / factory reset.’
  • Press Power button to select.
  • Press the Volume down key until ‘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 problem still persists even after the factory reset then you should bring your phone to an authorized service center and have it checked.

S4 Can’t Change Network Mode

Problem: Hi. Recently I was trying to fix my phone due to the no SIM card error and I accidentally switched the network mode to gsm even though my phone is a sprint phone. Now I can’t change it back to normal because it still says I have no SIM card and to switch it back I need a SIM card even though it’s inserted properly. I can’t make calls or text even if I’m on wifi. Please help, I don’t have the money for a new phone,I don’t have a warranty, and I don’t have money for a repair.

Solution: Try to restart your phone as this issue may just be a glitch in the phone software. If the problem still persists then take out the phone battery then press and hold the power button for at least a minute. Reinsert the battery then turn on your phone and try to change the network mode.

If you still can’t change the network mode then backup your phone data then do a factory reset.

  • Turn off the device.
  • Press and hold the following three buttons at the same time: Volume Up key, Home key, Power key.
  • When the phone vibrates, release the Power key but continue to press and hold the Volume Up key and the Home key.
  • When the Android System Recovery screen appears, release the Volume Up and Home keys.
  • Press the Volume down key several times key to highlight ‘wipe data / factory reset.’
  • Press Power button to select.
  • Press the Volume down key until ‘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.

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