4g usa mobile proxies

Who has the best, and I'm only looking for USA ips please. Thanks. I need to test something, hopefully one of these places will let me do a trial.

I personally can recommend you the Hydraproxy. Working perfectly with running my accounts.
They have a selling thread here: https://www.blackhatworld.com/seo/us-4g-mobile-residential-proxies-no-monthly-commitment-unlimited-access-flexible-billing-20-bhw-discount.1283922/
@HydraProxy <--- you can PM him for a trial test.

A lot of providers offer US mobile IPs on BHW,
I would like to vote to Soax, that you can ISP directly.

just ping 1-2 sellers and ask them, as they dont all visit this section
https://www.blackhatworld.com/forums/proxies-for-sale.112/