iphone does not let me text or use siri to dictate or find contacts in email. When I turn on my phone and click on messages and then try to type in a name, it freezes. Same thing happens when I try to compose and email. I click on a few letters for the email address and it freezes. voice dictation does not work either. Now, this all goes away after the phone has been ON for about 45 minutes. Then all is well. Any ideas?