The Honor X10, an upcoming budget phone from the Huawei sub-brand, may start at less than ¥2,300 (~$325). That would make it one of the cheapest 5G-compatible phones on the market, thanks to its HiSilicon Kirin 820 5G. However, this price is still just a rumor.
https://www.notebookcheck.net/Honor-X10-price-leaks-starts-at-yen2-299.464921.0.html