Why won't dialing connect using RCA RLTP5049C?

Dialing not connecting. I have a RCA RLTP5049C smartphone (Andriod 6.0) and MagicJack app on the phone.  I am finding about 70% of the time, I cannot call using Phone.  It just keeps dailing.  Sometimes I can move and things are ok.  I usually enter the phone number, but today after that did not work, I hit special contact and it contented right away.  Any ideas why I am having this problem?  I just bought the same setup for my brother, I may have to take it back!

Hi Wayne. During those times you tried making calls, do you have a stable internet connection? A bad connection may be stopping you from making those calls.

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