I am seeing serious problems with my Whispernet in the US. I have both a K2 and just got (two hours ago) my k3. I have never had any connectivity issues with the K2, from the beginning it linked up to 3G with five bars. The K3, however, is failing. I see it link at EDGE with two or three bars and then step up to GPRS with two bars. I have not seen it reach three bars GPRS at any time nor has it managed to achieve 3G at all.
I have both sitting next to each other the K2 at 3G five bars and the K3 at EDGE and 2 bars. I am not able to connect to the Kindle Store nor transfer any content from the Archived Items. It apparently was able to make enough of a connection to get registered and to get various basic settings from Amazon.
Off to customer service. <sigh>