A few batches of the GS407 (uBlox) modules came defective. This problem includes units sold by SparkFun and DIYDrones Store ... The problem seems to be around the antenna solder joins, they are weak and break easily, so any little crash may break it. You can try to solder them by removing the hard glue, but is not recommended because you will void the warranty.
If you carefully check the picture you will see three tiny gold pins, those pins support all the stress and weight of the whole antenna. The big solder balls you see are mine, not from factory...
The uBlox chipsets are intact and fully functional but they are unable to catch satellites.
If you are a victim of this situation, please send it back to me and i will chip them out to the factory for a FREE repair!
Don't send me the remains of your module if you hard crash it, your burn it or something else is not related to this issue. Only units ordered from DIYDrones Store
in good conditions will be accepted.