Re: DeepSeek - Dlaczego karty SIM przestają działać po wielu przekładaniach z telefonu do modemu ?

could you share data from real longevity tests of SIM cards in use in
Europe, US, China ?
Unfortunately, specific data from real longevity tests of SIM cards used
in Europe, the US, or China is not publicly available in detail, as this
information is typically proprietary and held by SIM card manufacturers,
mobile network operators, or standardization bodies. However, I can
provide some general insights into how SIM cards are tested for
longevity and what their expected lifespans are based on industry
standards and practices.
Industry Standards for SIM Card Longevity
SIM cards are designed and tested to meet international standards, such
as those set by the European Telecommunications Standards Institute
(ETSI) and the International Organization for Standardization (ISO).
These standards define the minimum requirements for durability,
performance, and longevity.
For example:
    ETSI TS 102 221: Specifies the physical, electrical, and logical
characteristics of SIM cards.
    ISO/IEC 7816: Defines standards for integrated circuit cards
(including SIM cards) regarding durability, contact resistance, and
environmental resilience.
Expected Lifespan of SIM Cards
While there is no single publicly available dataset for real-world
longevity tests, SIM cards are generally designed to last for 5 to 10
years under normal usage conditions. This lifespan is based on
accelerated aging tests and real-world usage scenarios.
Factors Influencing Lifespan:
    Insertion/Removal Cycles: SIM cards are typically tested to
withstand 10,000 to 50,000 insertion/removal cycles without significant
wear to the contacts.
    Environmental Conditions: SIM cards are tested to operate in
temperatures ranging from -25°C to +85°C and withstand humidity levels
up to 95%.
    Mechanical Stress: They are designed to resist bending, twisting,
and other physical stresses within defined limits.
Real-World Longevity in Different Regions
While specific data is not publicly available, the following trends can
be observed based on industry knowledge:
Europe:
    SIM cards in Europe are typically used for 5-7 years before being
replaced, often due to upgrades (e.g., switching to nano-SIM or eSIM)
rather than failure.
    Environmental factors like humidity and temperature are less extreme
in most European countries, which contributes to longer card lifespans.
United States:
    In the US, SIM cards are often replaced due to changes in carrier
plans or device upgrades rather than wear and tear.
    The lifespan is similar to Europe, averaging 5-7 years, but may be
shorter in regions with higher humidity or temperature fluctuations.
China:
    In China, SIM cards are heavily used due to the large population and
high mobile device penetration. The average lifespan is also around 5-7
years, but failures may occur earlier in rural areas with harsher
environmental conditions.
    China has also been rapidly adopting eSIM technology, which reduces
the reliance on physical SIM cards.
Accelerated Aging Tests
Manufacturers use accelerated aging tests to simulate years of use in a
short period. These tests include:
    Thermal Cycling: Exposing the SIM card to repeated temperature
changes to simulate years of use.
    Humidity Tests: Testing the card in high-humidity environments to
assess corrosion resistance.
    Mechanical Stress Tests: Repeated insertion/removal cycles and
bending tests to simulate physical wear.
While the exact data from these tests is proprietary, they ensure that
SIM cards meet the minimum durability requirements set by standards
organizations.
Why SIM Cards Fail in Real-World Use
Even though SIM cards are rigorously tested, real-world failures can
occur due to:
    Excessive Handling: Frequent insertion/removal beyond the tested
limits.
    Environmental Exposure: Prolonged exposure to moisture, dust, or
extreme temperatures.
    Physical Damage: Bending, scratching, or other mishandling.
    Manufacturing Defects: Rare cases where a card does not meet quality
standards.
Conclusion
While specific longevity data from Europe, the US, or China is not
publicly available, SIM cards are designed to last 5-10 years under
normal conditions. Their actual lifespan depends on usage patterns,
environmental factors, and handling. If you're experiencing frequent SIM
card failures, it may be worth investigating whether the issue is
related to the card, the device's SIM slot, or environmental factors.
For more detailed information, you would need to consult the specific
manufacturer or mobile operator.
--