When a smartphone failed to detect the SIM card, it’s either due to a software glitch or could be an indication of a damaged SIM card or SIM card tray. Generally, the problem is either on the software ...

"I failed yesterday, so I lined up early to replace my SIM card before going to work." On April 29, in front of an SK Telecom agency in Jung-gu, Seoul, people were waiting from 8 a.m. on the second ...