We will be driving I-75 from Ontario to Indian Shores in March. My Canadian Pay & Talk won't work in the USA because of roaming. Would you please provide any information on Disposable Pre-Paid Cell Phones. Where is the best place to purchase? how much air-time would be provided? will I have good signals? what is a good brand to buy? what is the best carrier for coverage from Ontario to Florida inclusive? All suggestions are very welcome.