Supra Key Safe What's The Best PDA Style Phone And Carrier For Realtors? Live MLS, Supra Key Connectivity, Phone Carrier,etc

What's the best PDA style phone and carrier for Realtors? Live MLS, Supra Key connectivity, Phone carrier,etc - supra key safe

From your experience, what is the best way to measure a company of mobile phone model mobile phone and PDA software, real estate agent to live connect and activate integrated MLS Supra Key.

Some of them have proposed that included the Palm Treo 700, but I'm looking for real estate agents that these services and determine which combination works best.

Large companies in my area include Sprint, Cingular, Verizon and T-Mobile. Thus, specific examples would be useful for these companies.

Thank you for your comments.