[marekbm]

Originally Posted by Gomorrah

Hi Marek,

Very ingenious system, I was wondering if it is possible to change the 2G gsm module to one that supports a 3/4G network based on the work you have done? I imagine it is not as easy as substituting modules on the board even if one was available. Australian carriers have started the 2G network shutdown and my phone no longer works. I have a Grom audio unit in for USB/BT playback and would like to keep the car phone system going seeing as I already have a separate sim for it.

Hi, the worst was implementation of three types of GSM modem into one firmware. At the beginning I was scared about melbus (text on the radio) but at the end it was easier than GSM modems. I have a lucky because I have started with the most complicated type (Ericsson, older models), from the hw side.