why does my phone say system busy when trying to make a call?

[Windows Central Question]

when trying to make a phone call the screen comes up with a message and says system busy... this has happend before but usualy starts working but today its just constant. i have full signal so its not my network

 

[Chintan Gohel]

when trying to make a phone call the screen comes up with a message and says system busy... this has happend before but usualy starts working but today its just constant. i have full signal so its not my network

have you tried to restart your phone to see if that clears the problem?

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