Hi Anwar,
Did you note this tip from Adafruit on the user guide:
On the left is a GPS antenna port. While you can connect a passive GPS antenna directly, we’ve found the performance is lacking. We recommend shorting the solder jumper labeled ‘bias’ and connecting an Active GPS antenna instead, such as the one we stock in the adafruit shop
Edit - I see you have. Hmm. It would be best to engage Adafruit as they are certainly better prepped to manage edge cases such as this along with the fault finding they are going to want to carry out on your end given they’ve already replaced the unit.
