Currently, there are a limited number of mobile phones that are manufactured in the USA. Some examples include:
Moto X (1st and 2nd Gen)
- Manufactured by Motorola in Fort Worth, Texas. Features Display a 4.7-inch and runs on Android.
Fairphone 3
- Manufactured by Fairphone, a social enterprise based in the Netherlands. Features a 5.65-inch display and runs on Android.
Puma Phone
- Manufactured by Puma, a sportswear company. Features a 2.8-inch display and runs on a proprietary operating system.
Boeing Black
- Manufactured by Boeing, an aerospace company. It's not a consumer phone, but a smartphone for Government and Military use.
It's worth noting that while these phones may be assembled in the USA, the individual components may be sourced from other countries.