L86 Wrong Location / Firmware

Hello. I am using l86-m33 module. There is a 3-4 kilometer difference between the location of the device and the location that the module sends. Could this be because of the firmware? If so, where can I get the latest firmware and the application that installed it? Please help.

Dear Sir,
Here is a topic which is similar to your question.
For reference: latest L86 firmware - #7 by Nizami_Kelbeliyev

Best regards.