Welcome and thanks for your question.
I'm Todd and I will be the expert working with you today to help resolve your problem.
Please note that electronics troubleshooting is not always easy and sometimes I will not be able to find solution for your problem immediately, so if my first answer does not resolve your problem or you need more information please do not rate my answer negative BAD SERVICE or POOR SERVICE
(that will result in a permanent negative feedback on my record - very damaging for me). Please use "Reply to Expert" button instead.•ANSWER•
This issue can be caused with bad network, but sometimes issue can be glitch in the software on your phone. Please perform the procedures below to be sure that problem is not on your side.
First of all reset your phone:A. Press and hold
the Sleep/Wake button and the Home button at the same time for at least 25 seconds (until the Apple logo appears). Please try this procedure at least 3 times.
If that doesn't help please try solution below:
1. Turn off your phone.
2. Remove and clean SIM card (if you have SIM card in your phone)
3. One of the best ways to clean your SIM contacts is to use a pencil eraser or rubber. Simply lay the SIM flat on a desk and gently rub the gold coloured SIM contacts with the rubber. Then blow off the bits of rubber and finally wipe with a dry piece of kitchen towel.
4. Replace SIM card
5. Press and hold the Sleep/Wake button and the Home button at the same time for at least 25 seconds (until the Apple logo appears).
Please try all solutions (step by step) and let me know if that works. I'll be waiting for your reply.If none of those solutions works or you need more information please do not rate my answer negative BAD service or POOR service. Reply to me using "Reply to Expert" button and I'll provide you with the next step.