Send the following on WhatsApp
Continue to ChatInternet Access in Hong Kong 香港互聯網接達技術(16) - 災難後,為什麼手機語音不通而微訊通? https://www.i-garden.org/blog/2013/05/13/internet-access-in-hong-kong-hong-kong-internet-access-technology-16-after-the-disaster-why-voice-barrier-micro-roadshow/