: A simple reboot can often clear temporary software glitches. Reseat and Clean the SIM : Turn off your phone and remove the SIM card.
Before you panic, it helps to understand what might be going wrong. The causes generally fall into three categories: why does my phone say invalid sim
The "Invalid SIM" error typically means your phone cannot communicate with the SIM card to identify your device on the mobile network . This usually prevents you from making calls, sending texts, or using mobile data. Common Causes : A simple reboot can often clear temporary