When a phone enters SOS mode, it usually means the device cannot connect properly to your mobile carrier’s network and can only make emergency calls. This can happen because of weak signal coverage, SIM card problems, carrier outages, or temporary software glitches. On devices like the Apple iPhone or Android phones, traveling to remote areas or switching network settings can also trigger SOS mode. In some cases, an expired mobile plan or damaged SIM card may prevent the phone from reconnecting to the network normally. Know more about how to get phone out of sos mode