The reason your phone is on SOS mode is that it is not fully connected to your cellular network, but it can still make emergency calls. This "SOS" or "SOS only" status often appears when your phone has lost connection to your carrier’s network and can only access emergency services, either due to being in an area with poor or no cellular coverage, a software glitch, incorrect network settings, or SIM card issues. It means you can make emergency calls but cannot use regular phone services for texts, calls, or data. Common causes for being stuck in SOS mode include accidentally triggering Emergency SOS, software glitches, SIM card problems (damaged, dirty, or improperly seated), network or carrier issues, or Wi-Fi problems. Solutions include restarting the phone, toggling airplane mode on and off, removing and reinserting or replacing the SIM card, updating carrier settings and phone software, resetting network settings, and contacting your carrier if the problem persists. In summary, SOS mode indicates the phone is limited to emergency calls due to lack of full network service and usually can be resolved by troubleshooting software, SIM card, or network settings issues.