ZTE Zmax Pro metro pcs locked

[Prometheus1469]

I bought a used Zmax Pro its network locked by metro pcs. I want to use my metro pcs SIM from a different phone but it is not working. What can I do?

 

[B. Diddy]

Welcome to Android Central! It seems to me that it should work with a MetroPCS SIM. Have you asked the carrier about this? Are you getting an error message, or is it just showing no bars?