As mentioned in the title, we have made a circuit using SIM39EA, and we are able to get the UART Rx/Tx working properly. But we are facing issues with getting a fix. Firstly it takes too long for the chip to get a fix from multiple satellites after a cold start. Datasheet says it should be 35 seconds. In our case it make more than 10-15 mins to get fix. Even after getting a fix, the location reported is more than 500 m away from the actual location. Since this chip is specifically for GPS and multiple people have used it with good results we were are not sure what we are doing incorrectly. Is this something that updating the internal MT3333 firmware can help with, if so can anyone help us with getting the correct latest firmware. Also any other advice to debug/fix would also be appreciated.