From the looks of it this is probably a ZX297520V3 based device. See this topic Work in Progress Kernel for ZTE zx297520v3
Notably some of the linked topics refer to exploits that can be used to gain a shell. It might even be possible straight away using adb over that micro-USB port. Mentioning its existence was quite helpful these devices tend to have such a port. Also they tend to use Realtek WiFi chips.