UMTS, G3, G4, HSPA? Do all carriers support the Blackberry mobile phones?

Let's begin with the abbreviations. UMTS stands for Universal Mobile Telecommunications System. It's a 3G system similar to the GSM that AT&T and T-Mobile use but it requires new cell towers to be installed to work properly.

G3 and 3G are interchangeable and mean "third generation mobile". HSPA stands for gh Speed Packet Access and is the same basic system as GSM except it's a bit slower on data. A great resource for you might be at "http://www.gsmworld.com/technology/".

They have in depth information about the technologies you're interested in.As far as which carrier to select, nearly all post-paid or contract carriers feature at least one Blackberry phone. The difference will come in the coverage in your area( for AT&T see http://www.wireless.att.com/coverageviewer/#?type=voice for Verizon see http://www.verizonwireless.com/b2c/CoverageLocatorController for T-Mobile see http://www.t-mobile.com/coverage/pcc.aspx for see Sprint Wireless http://coverage.sprint.com/IMPACT.jsp?For US Cellular see http://www.uscellular.com/coverage-map/voice-and-data-maps.html for Metro PCS see http://www.metropcs.com/coverage/) All these carriers have Blackberry phones. Remember that only GSM phones can do voice and data simultaneously so that might be a key deciding factor for you.

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