Guys it seens like a lot of people are having this problem. I myself am as well and i think its just the area your in. For example where i live i always try to get a sat lock but get nothing; yet when i drive away maybe 20 miles it locks. I'll shut it off than try to lock again, it finds the sats in no time always, yet when i get back home and sats are not locked and i try to lock onto sats it doesn't find anything.
That's from my experience. I still don't know what to make from it.