turned phone on and only the screen came on that says ZTE and android?

[AC Question]

Now it won't turn off

 

[Sam_Gs7]

Welcome to ACentral: Is that a chines phone with removable battery
pull it out and Returned..do the same with the SIMcard does it
Turned off now.? Also the acronym ZTE according with this
dictionary refers to the 3rd largest phone manufacturer
read out: What does ZTE stand for?