Over the weekend the gps reciever on my 8900 quit working. The device could not find satellites. I called tmo cs this morning after spending about 15 minutes with tmo cs trying to fix the problem they passed me to bb. Bb worked with me for about 30 minutes ended up downloading os (v4.6.1.114) from tmo site and reinstalling. Then selective restore from backup to get my data back. This was the first time i've needed bb cs in my experence with 5 different bbs over the last 6 years. I'm impressed with their service!
sometimes mine dowsnt work if i am using wifi for awhile. Once I get out on edge doesnt pick back up so I go options-gps-refresh gps and works fine after that but good to see they r on the ball for you