We are using the UDOO NEO, and recently purchased a GSM/GPRS shield (see here), with the goal of integrating it into the network stack. We are a non-profit that develops headless Android devices and places them in trees in the rainforest to stop illegal deforestation and poaching (https://rfcx.org if you're interested). We currently use donated cell phones, but we are investigating using the UDOO NEO integrated with GSM capabilities to replace the phones entirely. Has anyone successfully used a GSM shield with Android on the UDOO NEO? Ideally, it would be integrated such that our existing Android apps can simply make network requests as normal, and Android will take care of sending the data to the GSM module. I'm assuming we're going to have to hack on the low-level network drivers to re-route data to the shield over serial and use the AT command set, but if there's an easier way, we'd love to know! Cheers!