Greetings, all. I just bought an 11 Explorer XLT about a month ago and I've noticed a similar issue. It's taken me awhile to identify the exact issue. When I bought it, everything seemed fine...but I think I was still new to having an in-dash touchscreen (I'm coming from an '02 Sport Trac.)
Anyway, as soon as I bought it, I purchased the A7 navigation update and did the MFT update as well. The system kept locking up after that like it was having trouble reading from the SD card. I took it to the dealer where I bought it and they updated "all the systems" they acted like they have access to more updates than I have access to at owner.ford.com. I'm new to all of this, so I just said 'cool' and took my car home.
The locking up has seemed to go away, but the GPS still has issues getting a lock. It happens more when I first go to work than any other time. I go to work at 6am eastern, so the sun is still down (if that makes a difference.) It usually won't get a lock until 10 minutes into my drive.
Should I take this back to the dealer to have them check the GPSM for updates and possibly replace? I'm envious of those of you that say yours connects within 15-20 seconds.
On a side note, I didn't know that the GPSM was a separate unit until reading this thread, so I didn't know to specifically ask them to check the GPSM for updates.
Thanks to anyone that can throw some advise my way. I really love my new (to me) vehicle. It's quite the step up from the 02 Sport Trac.