Mobile phone
You can buy a SIM card for about $12.37, which includes 1 GB of data plan. You can choose from 4 telecoms: AT&T, Sprint, T-Mobile or Verizon Wireless.
Mobile phones
United States uses GSM mobile networks GSM 1900.
Roaming
If you don't want to buy SIM card in United States upon arrival, make sure to check the roaming charges with your telecom provider before your departure so there are no surprises when you return home.