R
Rick C
Guest
On Sunday, March 29, 2020 at 3:00:28 PM UTC-4, Jeff Liebermann wrote:
I guess we can't do that here because we value our freedom to be infected?
--
Rick C.
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On Sun, 29 Mar 2020 00:48:27 -0700 (PDT), Bill Sloman
bill.sloman@ieee.org> wrote:
On Sunday, March 29, 2020 at 5:03:37 PM UTC+11, Jeff Liebermann wrote:
On Sat, 28 Mar 2020 20:14:13 -0700 (PDT), Bill Sloman
bill.sloman@ieee.org> wrote:
Chinese migrant worked used to have two cell phones - one for making
local calls where they worked and the other for making local calls
when they were at home. If all those second phone had got retired,
you've got your explanation.
Not exactly. Chinese smart phones usually have dual SIM slots for
that purpose. Since that phone cannot connect to two different
services at the same time, they appear on call logs as one IMEI or
MEID for both SIMs.
There are also various reasons why they need dual SIMs.
"Why do Chinese smartphones have two SIM card slots?"
https://www.quora.com/Why-do-Chinese-smartphones-have-two-SIM-card-slots
Same principle. It is the phone numbers that have been retired, not necessarily the phones themselves.
https://www.sciencedirect.com/science/article/pii/S0262407920305704
makes the point that the Chinese success wasn't primarily due to rigid lock-down, but the same sort of fanatical contact tracing and isolation of people who might have got infected that was used in South Korea. South Korea had enough warning that they could go straight to contact tracing, and didn't need to bother with lock-down.
If they were relying on cell-phones to keep track of people, they wouldn't be happy if the cell-phone had two SIM cards which could have been swapped between phones by people wanting to sneak out.
It doesn't matter if the phone number changes. The IMEI or MEID will
not change because they are burned into the firmware of the phone and
are not part of the user accessible SIM.
That Korea is doing is tracking people using an app (and testing):
https://www.marketwatch.com/story/wildly-popular-coronavirus-tracker-app-helps-south-koreans-steer-clear-of-outbreak-areas-2020-03-18
Those users are expected to enter their medical status twice per day.
If they're locked down, and they step outside the house or apartment,
the authorities will contact them with a suitable threat if they fail
to cooperate. If they are shown to be infected, or come in contact
with someone else known to be infected, the GPS location log is used
to do contact tracing and isolate everyone who might have been
exposed. I don't have any info on how China did it, but I suspect
it's similar.
I guess we can't do that here because we value our freedom to be infected?
--
Rick C.
---- Get 1,000 miles of free Supercharging
---- Tesla referral code - https://ts.la/richard11209