my husband and I both have been having the same issue since we switched to IPhones OVER A YEAR AGO! We have been in our carrier's store repeatedly, on the phone with Apple repeatedly, customer service, technical support, EVERYONE again and again and again. I am so tired of paying over $300 a month for services we are NOT receiving! They have swapped phones, SIM cards, reset, reconfigured… nothing has helped. Now my husband’s job is in jeopardy because he can rarely be reached to respond to emergency service calls. My 4 year old was running a fever of 104 at her daycare and they were unable to reach me because of this issue. This has become a huge problem that is now affecting the safety and livelihood of my family. DO BETTER APPLE!