Someone came up with a brilliant idea that makes things easy for travellers to the United States: a pre-paid SIM that can be activated within minutes via SMS, and that comes pre-loaded with either a data-only plan or a Talk+Text+Data plan for periods that range from 7 to 30 days.
The Talk+Text+Data SIMs include unlimited nationwide talk, unlimited international text, unthrottled 4G LTE data and free voicemail and caller ID. The Data Only SIM Cards include the same unthrottled 4G LTE data, with tethering to multiple devices. Ready SIM claims nationwide network coverage and top ups can be done at any participating wireless kiosk located throughout the USA.
This sounds brilliant. Every country should have something like this. Travellers arrive, pick up a SIM and just get connected near instantly. The Ready SIM also eliminates the fear and real damages of roaming fees. Travellers to the USA really should give this a try.