Why can't I access voicemail on my ZTE Grand X 4?

This phone sucks. When I try to sign in to set up voicemail, it saysSorry we are having technical difficulties for the last 3 days. HELP

I can't get anything to work on this damned phone.  I can't even sign in.  It says no network.  




Hi Sue. Please directly contact your carrier about this.  Must be some network issue that got you stuck there.



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