Verizon will have your best data coverage. How long will you be stateside? The best rates will be from a "mini lease" program. They're usually a 2 month contract. Avis was around $3,000 U.S.D. Unlimited miles. One way fee, and taxes were about $1500 and the car itself was about $1500.

Best of luck!

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95 Honda Shadow ACE 1100.
1999 Plymouth Neon Expresso. 2.4 swap, 10.5 to 1 comp, big cams. Autocross time attack vehicle!
2012 Escape, 'hunter" (5 sp 4cyl)