And to continue the excitement, here is what the 700p manual says about gray green AND BLUE arrows, up and down and sideways too!!!!!!

Your phone is on and is connected to the Sprint PCS Vision or NationalAccess (1xRTT) data network. When the arrows are green, data is being transferred (for example, when you are opening a Web page) and you cannot receive calls. When the arrows are gray, you are connected to the network but data is not currently being transferred (for example, when you are viewing a Web page that is completely open), and you can receive calls.

or

Your phone is on and is connected to the high-speed Sprint Power Vision or Verizon BroadbandAccess (EvDO) data network. When the triangles are blue, data is being transferred (for example, when you are opening a Web page); when the triangles are gray, you are connected to the network but data is not currently being transferred (for example, when you are viewing a Web page that is completely open). In either state, you can receive incoming calls.