I have the MiFi 4510L and so far I have had no issues. I get a strong signal with and upload rate of around 12 mb and a download rate of around 4 mb. My ping rate is always between 125 to 135 ms but I have read that it can be lowered by adjusting the settings. Does anyone know if this is true? If so, where can I go to adjust the settings. I have logged onto the Mifi via the web and I have adjusted a few settings to meet my needs but I can not find any settings that could help me with my ping rate. Thanks!