need help finding coverage for different areas

[illmaticnyc]

i am doing a lot of travelling for business to those areas. Puerto Rico, the entire US including Alaska, Bahamas, and South America (ievenezuela, peru, northern regions.)

what phone and what carrier is my best bet? gsm?

[enothing]

a world phone:
Verizon's Samsung SCH-A790 is a world phone that roams in cdma and gsm networks. Verizon signed contracts with more than 100 countries for roaming.

Editors' rating:7.3 Very good
Average user rating:6.2 Good (from 13 users)
The good:CDMA and GSM world roaming; gorgeous internal and external color LCDs; solid camera; decent customization options; strong call quality and battery life.
The bad:Expensive GSM roaming; no speakerphone, built-in e-mail access, or conference calling; comes with only a desktop charger.
What's it for:Talking; taking photos.
Who's it for:Globe-trotting cell phone chatterers who must stay in touch no matter where they are in the world.
Business use:Tracking appointments; storing contacts.
Essential extrasata cables; PC-syncing software; car kit; travel-charger carrying case.
The bottom line:Samsung's stylish world phone roams on both CDMA and GSM networks, but it's saddled with a hard-to-use keypad, and it lacks some key features.

Review taken from: cnet.com
http://reviews.cnet.com/Samsung_SCH_...l?tag=topprods