I have written a program that operates a cellular 3G XBee radio in API mode. The program successfully sends data to a server, and receives Tx Status however, it is rather slow. Approximately 0.25 seconds between transmissions. Which happens to be about as fast as the XBee Python library. If I disable Tx status frame the radio will send data but only 5 or so transmissions make it to the server. The same is true if I use XCTU to send the XBee the same frame. My question is, is this an XBee issue or is this a server issue? It is rather odd to me because the same 3G XBee can send data to the same server rather quickly when the XBee is configured for Transparent Mode operation. Any help would be appreciated. Thank you.