What is the power consumption of a SIM card? How does energy saving work?

Question

SIM cards

The ledefy program allows you to view a graph of the life of my phone at one percent of the battery charge. These are quite reliable data, they are well reproduced, and do not depend on the current battery level. At night, when the phone is lying quietly, the operating time at one percent fluctuates around 45 minutes. If you turn off the radio module, it increases to 4.5 hours, which is understandable.
I read that modern SIM cards support energy saving technology, which is called SIM Clock Stopping in some places . I decided to check how tangible the result from the use of this technology is - my SIM card is about 5 years old, it may not support this technology. I bought a new SIM card from the same operator, and inserted it in place of the old one.
The operating time at 1 percent increased to 2 hours 45 minutes, that is, three times.
Measurements are made under the same conditions, and reproduced - such a difference cannot be attributed to measurement error.
However, a competent comrade assures me that the power consumption of the SIM card processor is so low that the possibility of stopping it cannot significantly affect the operating time.
Therefore, I assumed that the reason could be, for example, in poor contact with the old SIM card, but I still decided to look for what the usual power consumption of a SIM card is, how it depends on the phone's operating mode, etc. However, he could not find almost anything.
Here you can see that there are POWER OFF CARD and POWER ON CARD commands, however, it is not clear what they mean.
From Pagewiki external links lead to documents that cannot be viewed without complex registration.
In this post, the question about energy consumption is sent here , however I cannot find energy consumption figures there.
In general, I'm interested in:
1) the power consumption of modern SIM cards in standby mode - update: it is less than 200 μA.
2) how effective are the energy saving technologies of SIM cards - update: all the time when the card does not communicate with the terminal, it is in the waiting state. Enabling STOP CLOCK mode will not significantly affect power consumption.
3) if the phone can stay in touch with the SIM card in a state of low consumption (that is, it normally communicates with the network at the same time), in which cases the active work of the SIM card processor is generally required (except for the obvious viewing of contacts / operator codes). update: see update to the previous paragraph. The frequency of interaction between the phone and the card greatly depends on both the settings of the phone itself and the settings of a specific SIM card.
Thank you in advance.
update: information taken from the found strib of ETSI TS 10221 , clauses 6.2 and 5.1.1.
Power consumption when communicating with the terminal is within 10..60 mA.
It should be noted that the parameters of old SIM cards may differ markedly from this (modern) standard.

Answer 1

ETSI TS 10221.
www.etsi.org/deliver/etsi_ts/102200_102299/102221/09.02.00_60/ts_102221v090200p.pdf
Clause 6.2

Answer 2

You have already been answered about energy consumption.
Regarding the reasons for the difference in life time (we will proceed from the fact that SIM cards are different as well as the set of applications on them):
1) SIM can send the POLL INTERVAL command to the phone. This command will tell the phone how often it should send the STATUS command to the card. For example, if the interval in the first case is N seconds, and in the second 10 * N, then the difference in operating time can probably be explained (I don’t know how much energy the phone will spend on sending commands and processing the response). It is quite possible that in the second case, polling is generally disabled by the POLLING OFF command.
2) Perhaps on the first card there is an application like Celltick, which catches CELL BROADCAST MESSAGE and displays them on the screen (a kind of news/advertising spam). Does your phone show any messages in IDLE MODE?
3) The SIM card can send SMS to the network without your knowledge (if there is a special application, for example, it is often used to send an updated IMEI phone), or mb it regularly asks the phone for some data such as Network Measurement Result, location information etc ... Maybe just a banal bug in the card software, which constantly sends one of the above commands to the card (and what, it can be).
It's impossible to say 100% without the logs of the phone's communication with the card, it seems to me. At least I will not undertake to assert.
PS: The POWER OFF CARD and POWER ON CARD commands are proactive (sent by the card to the phone). Used to enable/disable the OPTIONAL card. What kind of additional card - I did not understand. Judging by the statistics from my sources, out of ~ 900 tested phones, they (POWER ON / OFF commands) are supported only in 75 (60 of which are manufactured by Motorola). More precisely, they are not even supported, but declared as supported. It seems that the commands are not currently used at all.

Answer 3

If you wish, you can simply measure it, I'm sure that there will be microamps of consumption.
And the phone does not check data from the card so often.

Answer 4

Well , here 's a mikruha for powering sims, as I understand it, 50mA, you can already draw conclusions about the limits.
Here and there is some more interesting information.
Well, in general, I subtracted this:
Based on the nominal supply voltage provided by the
interfacing device through VCC, the smart card can be
classified into three types:
• Class A – 4.5V ≤ VCC ≤ 5.5V at ICC ≤ 60 mA
• Class B – 2.70V ≤ VCC ≤ 3.3V at ICC ≤ 50 mA
• Class C – 1.62V ≤ VCC ≤ 1.98V at ICC ≤ 30 mA

Answer 5

You drove yourself into the wrong corner, sms, coordinates, yes, of course, but the main thing is that the phone constantly pings the network with a period of usually several minutes and it depends on the transmitter, whether the signal level is saved, etc.