In an effort to offer solutions/workarounds for this problem, we did some diggings from pertinent forum contents and luckily ended up with the following sensible findings.
What possibly causes the problem?
Possible causes of the Galaxy S5 not receiving signal or service would include the following:
1. Carrier switching
In some cases, No Signal or No Service problem is likely due to network outage in the area. Outdated device software can also trigger the same problem to occur in a device.
Considering the aforesaid possible causes, the problem on No signal or service will likely be resolved by doing any of the following workarounds:
1. Make sure the problem is not due to a delinquent account status. Please verify your account status and make sure it is in good standing before you instigate troubleshooting.
How to Verify Airplane Mode is Not Active
1. Press and hold the Power button on your device for up to two seconds.
HINT: You will know when the Airplane mode is inactive once you see this caption: "Airplane mode is OFF." If you do not see this, then touch Airplane mode to make it not active or disabled.
If problem persists, try these:
1. Re-establish network connectivity with the mobile network. Here's how:
- * Remove the battery for 30 seconds with the device remained ON.
- * After 30 seconds, replace the battery.
- * Power on the device.
- * Wait until the device re-establishes connection with the network.
2. Make a test call and send it to your VoiceMail. If it goes through, then that means your device has already established connection with the mobile network.
Alternative Quick Solutions to Network Connectivity Issues
1. Restart the device and check network.
If the issue remains, try to uninstall any third-party application you have downloaded and installed to your mobile. There are some apps that tend to disrupt network connections between the device and mobile network.