I bought my phone 6 months ago and it was fine but 5days ago suddenly I can't call anyone it doesn't ring and nobody receives my call, also when someone calls me i dont receive the call i just receive a missed call on messages. I tried putting my sim card in another phone and it worked so what shall i do?
You might need to check the settings in your Phone app. I guess you might have set it to block all calls without caller ID aka private numbers. That happened to me for couple of months realizing that I received no calls from spammers and actual contacts.