https://youtu.be/64hYv6OVDuc

If it stays home and never scans a QR code, it won't get updated so it wouldn't flag anyone infected people's phone passing by. Each time a QR code is scanned, the app accesses the updated co-location database.
If their smartphone never scans a QR code, then yes, same same your stay-at-home tablet. I am not sure what percentage of people would never leave the market, never use a 7-eleven or otherwise never encounter a QR scan point. It's not an infallible or perfect system and cannot account for those that have no smartphone or just can't be bothered.
These systems all work on some form of proximity detection with phone-to-phone Bluetooth being the primary, totally ANONYMOUS hand-shake.
Most SIM's are internet ready these days. I think AIS did their across-the-board SIM upgrade several years ago. I recall getting the message and dropping by their Pattaya store and getting the old-for-new swap, same number, etc.. A cheap data package is all you need. DTAC has a decent one that gives you a year of 64 kbps data which is all you need for the likes of ThaiChana, MorChana and messaging apps.Khun Paul wrote: ↑January 9, 2021, 7:49 amWhat you also need is an INTERNET SIM, I have installed it but unable to operate in Big C, Makro or other places as I do not have an Internet Sim and will not buy one either. My phone can access the Internet if I know others places passwords, but not all the time. need some peace, I do not live for my phone it is a tool of communication only.
I appreciate what you say , but I have no intention of paying for a DATA package at all, they want citizens to com-ply they should enable free wi-fi for all or find another way.tamada wrote: ↑January 9, 2021, 1:45 pmMost SIM's are internet ready these days. I think AIS did their across-the-board SIM upgrade several years ago. I recall getting the message and dropping by their Pattaya store and getting the old-for-new swap, same number, etc.. A cheap data package is all you need. DTAC has a decent one that gives you a year of 64 kbps data which is all you need for the likes of ThaiChana, MorChana and messaging apps.Khun Paul wrote: ↑January 9, 2021, 7:49 amWhat you also need is an INTERNET SIM, I have installed it but unable to operate in Big C, Makro or other places as I do not have an Internet Sim and will not buy one either. My phone can access the Internet if I know others places passwords, but not all the time. need some peace, I do not live for my phone it is a tool of communication only.