if your Phone screen cracks accidentally. You want to replace it with a new one. Here is the Screen replacing video and ZTE Grand Screen part. It can help to replace the phone screen yourself.

Hi Deborah. Tried looking for replacement parts online and found these 2: link 1, link 2

If you plan to fix it by yourself, here's a video that can help you figure out how to do it. But if you're unsure, I highly suggest pay a technician instead of worsening the problem on your phone by making mistake while making the repair by yourself.