Free phone calls for Africa & the poorest of the poor
According to this article your average African spends 8.8% of his income for 1GB of data. This is how to use whatsapp without a sim card and piggy back on anothers wifi for your phone calls for free. This is more info I'm looking into for free SMS'es etc but the whatsapp route is away easier and likes being free so why mess with legal wrangling to get free phone calls. Whatsapp has 2 billion users worldwide as of Mar 2022, a quarter of the worlds population. How android open source uses the modem, the layer is callled RIL radio interface layer. The standard RIL uses the exact same AT modem commands I programmed at option when writing a 3d usb modem driver on a qualcomm chipset. https://android.googlesource.com/platform/hardware/ril/+/donut-release/reference-ril/reference-ril.c I am interested in sharing a phone connection via asterisk PABX software running on a raspberry pi with modem or ideally a plain mobile phone. so africans can make cheap calls over wifi sip etc all