No Sim Card Installed Meaning. If the sim card works, there is a chance that the original sim card has problems. This may seem obvious, but it’s helpful to restate the problem here:
Doing this is probably the easiest way to fix the sim error: First, try to reboot your phone by holding the power button and home button together for at least 10 secs. A sim card is what a gsm carrier uses to connect to its cellular network.
Sim card doesn't insert properly.
Not having a sim card doesn’t mean the phone won’t work. When this happens, your device can’t read the sim card. Sim card cannot be detected after software updat****e. If your device keeps searching for a signal or the device states there is no sim or sos only, there are 6 possible reasons.
