Can the Electron be used for GSM voice applications?

Hi. Can the Electron be used for GSM voice applications without a separate breakout board? It appears that the ublox module supports that but I am not certain. I am planning to build a DIY cell phone and was wondering if the Electron has all the GSM hardware needed for that.

Thanks,
Mark

I’m not sure if all the pins required for voice application is available on the electron to achieve this.