Dobson, Alltel and chat

In addition to Verizon, it appears that Dobson has now also put a hold on new chat programs where as Alltel is following Tmobile by limiting the premium billing of chat services to 99c. As a result, it is increasingly difficult to launch cross-carrier chat services on new short codes. Here's a summary of the limitations by carrier for chat services:

• Verizon: on hold.
• Cingular: no limitations.
• Sprint: limited to 50c per message. Human content filtering required.
  
• Tmobile: limited to 99c per message
  
• Alltel: limited to 99c per message
• Dobson: on hold.
• Nextel/Boost: no limiations.