UBlox says that theit 7P device supports GLONASS. I purchased one from CSGShop. The trouble is that I can't figure out how to enable it. I'm using the latest u-center software v8.17 and trying to enable it in the GNSS configuration screen. Every time I check the enable box and click Send, it unchecks itself. Nothing I've read tells me that there's some magic incantation to get it to work. I've even gone so far as to disable the other GNSS types. No luck. Anyone know how to do this?