I recently bought a pair of XBee PRO S3B modules (900Mhz, 9600 baud) and a Sparkfun Xbee dongle (USB). When I run XCTU, it finds the module easily enough, and it's the correct module type, but when I load the settings into XCTU, they're mostly junk data (out of range values, etc.) - even after I reset everything to factory settings and wrote the data out, when I read it back in it's all junk again. I tried using the recovery feature to reload the firmware but the same thing keeps happening. This has happened for both modules I purchased. Did I buy faulty modules? They were bought on Amazon.com - do I need to buy from another source to avoid getting bad modules? Or am I missing something? I'm using the Mac OS X version of XCTU. Please help!