Phone dropping calls - Has never happened before.

[Kphonefl]

My  Iphone6  is dropping calls - I'm in area code 50131.  I've never had trouble with my phone dropping calls.  Now it's been dropping multiple calls. It happenend in area code 50131- full coverage and just happened now in area code 20002.  There is 4 bars on my signal.  Any idea why it's dropping calls?

[BrownSugar67]

I had the same issue. I rest the network under settings then general scroll down then hit rest and you should reset network settings and I got a new SIM card. I hope this help