U.S. Cellphone Number
Your personal cellphone number from your home country will probably work on any big network here in the U.S. (such as Verizon, T-Mobile, AT&T and MetroPCS), but keep in mind that it might be very expensive to use it here. Therefore we highly recommend to purchase a U.S. sim card.
Besides that you will have to submit a private U.S. telephone number on your Check-In form so we can activate your record in SEVIS, it is cheaper and easier to use a cellphone with an U.S. number.
The company J-1 SIM offers SIM cards exclusively to J-1 Exchange Visitors and operates on the T-Mobile network, a large U.S. carrier. You can receive unlimited national and international calls, texts, and national data for just $40/month. You do not sign a contract and you can deactivate the sim card whenever you want. More information can be found here.