<500kb/s? that is very poor speed, by the way, it is wired speed to the router or wireless speed? if wired speed is normal, you may try to change wifi channel and channel width to see whether it...

How about wired speed on the HP laptop to the C7? is that normal? you may also check the wireless link speed when connected the laptop to C7 via WiFi

nice share!!!

will your MiFi get hot? power it off when you don't need the wifi

since it works perfectly, there is no need to update the firmware, sometimes, wrong update will brick the device...

you'd better contact tplink technical support to check it