Although the sub-US$200 market sector is quite crowded these days and there are a few capable handsets even around US$100, the ZTE Tempo Go tries to fight them with a price tag of just US$79.99. Sadly, this is nothing new, since the Tempo Go is only a ZTE Tempo X — a handset that arrived in late September 2017 — with Android Go onboard and a slightly different name.
https://www.notebookcheck.net/ZTE-Tempo-Go-now-shipping-in-the-US.293642.0.html