I have the samsung r451c cell phone and now I can't make phone calls or receive

evemama2003

New member
phone calls.? I have the straight talk service. Ive had it for 3 months with no problem. Until now when I try to make a call my phone says call failed and I can't access the internet either. I accidentally hit the "send dtmf button" earlier would that have something to do with why my phone wont receive or make calls?
 
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