From Fedora Project Wiki

US SIM cards for Flock attendeed

Ready SIM is USA service for short-term wireless prepaid SIM cards.

Who's interested in

FAQ

  1. will Ready SIM work with my smartphone
    • Ready SIM uses T-Mobile network with a bit non-standard UMTS frequencies. Your phone has to support 3G in 1700/1900 band. No guarantees it will work with phones supporting 1900 only. 2G fallback should always work.