How Long Does a SIM Card Last? (Physical vs eSIM)

A physical SIM can genuinely wear out over years of insertion, removal, and moisture exposure, but most "dead SIM" cases are a carrier deactivating the number after long inactivity, not the card failing. An eSIM profile has no physical contacts to wear down, but it isn't immortal either: it lives inside a plan with its own validity window, and once that window closes, the profile is inactive whether you used it or not. Neither format has a fixed shelf life. Both run on rules, not age.

#Do physical SIM cards go bad?

Yes, in two different ways that get lumped together as "the SIM died."

Physical wear is real. Verizon's own SIM troubleshooting guide lists scratched or damaged gold contacts, and corrosion of the contacts or SIM tray, as documented causes of a card no longer being recognized. A SIM that has sat in one device for years rarely has this problem; one swapped between three phones is a different story.

Carrier deactivation is far more common than physical failure. Most "my old SIM stopped working" cases are the network purging the account, not the chip. AT&T's official prepaid support documentation describes this directly: if a prepaid balance expires and no payment lands within the grace period, the account is canceled, and restoring service means buying a new SIM card and plan. Once a carrier deletes the subscriber record, the card is inert plastic that no amount of cleaning fixes.

Both causes produce the same symptom, "SIM not detected," but need different fixes: worn contacts can sometimes be resolved by carefully cleaning the gold pins; carrier deactivation requires a new SIM and a fresh activation.

#Do eSIM profiles expire the same way?

No physical wear applies, because there are no contacts, no tray, nothing to corrode. The embedded chip that holds eSIM profiles is soldered into the phone and, per the GSMA's eSIM standard, is built to securely store and switch between multiple downloaded operator profiles for the life of the device.

That doesn't mean a profile lasts forever, only that the question stops being about hardware and becomes entirely about the plan attached to it. Every travel eSIM has a data allowance and a validity period, and when that period ends, the plan is done whether you used every gigabyte or none of it. Each co:sim plan page states the exact data amount and validity window before you buy, so there's no guessing when a given profile's window closes. Even without physical wear, a profile that never connects to a network is still governed by the subscriber record behind it, with no guarantee of staying live once its own validity terms are up.

A dormant, installed eSIM profile sitting between two trips isn't degrading; it's just waiting on whatever window its plan defined, the same way an unused physical SIM waits on carrier rules rather than on time itself.

#Can you reuse an old travel eSIM for a new trip?

Usually no, and this is the most common source of "my eSIM stopped working" confusion for repeat travelers. A travel eSIM profile is tied to the specific plan you bought: a fixed data amount over a fixed validity window. Once that window ends, the profile still visibly "installed" on your phone is functionally defunct, even if it sat untouched for months between trips.

The practical fix is exactly what buying a new eSIM is for. On co:sim, each purchase is its own independent plan with its own validity window, so returning to a destination months or years later just means buying again from the account dashboard, not trying to resurrect the old profile. The QR code arrives by email within seconds of checkout, and every plan page states its validity terms before you pay. A return visit to Thailand takes the same few minutes as any first-time purchase.

#FAQ

#Does an unused SIM sitting in a drawer eventually stop working?

It depends on whether it was ever activated. A SIM that was never inserted and paired with a live subscriber account has no fixed shelf life; the plastic and chip don't age on their own, so it's fine to try it years later, form factor permitting. What changes over time is carrier practice: once a SIM has been activated and then goes unused, most carriers apply an inactivity policy that can suspend and eventually cancel the associated account, independent of the card's physical condition. So a brand-new, never-activated SIM in a drawer is genuinely stable and worth trying, but a SIM you used for a year and then set aside is running against your carrier's inactivity clock, not against the card's own durability, and reactivating it isn't guaranteed to work.

#Why did my old SIM stop working when I put it back in my phone?

The likely cause is carrier deactivation, not a broken card. If the number went unused past your carrier's inactivity window, the carrier can suspend and then cancel the account on its side, severing the connection between that physical card and any active service. AT&T's own support documentation describes exactly this for prepaid accounts: once the grace period on an expired balance passes, the account is canceled, and restoring service requires a new SIM card and plan. Reinserting the old card won't reverse that, because the failure lives in the carrier's records, not the plastic. If contacts look scratched or corroded, that's a separate, less common physical cause worth ruling out with a careful clean, but check for account cancellation first.

#Is there a real difference in "lifespan" between an eSIM and a physical SIM?

Yes, but only in physical durability, not overall plan behavior. A physical SIM has real, if slow, hardware failure modes: contact wear from repeated swapping and corrosion from moisture, both documented in Verizon's own troubleshooting guidance for cards that stop being recognized. An eSIM profile has none of that, since it's a software download onto a chip soldered into the phone, per the GSMA's eSIM standard, with no tray or pins to scratch or corrode. But once you're talking about the plan attached to either format, the two are functionally identical: a fixed data allowance and validity window that ends on schedule, regardless of format. Neither an eSIM nor a physical SIM outlives its own plan's terms, and neither format makes a plan last longer than the one you actually bought.

#How many times can you reinstall an eSIM profile?

For most travel eSIM plans, effectively once, tied to that specific plan rather than to a device limit. If you delete a downloaded eSIM profile, Apple's own setup documentation treats this as removing the download entirely, and getting it back generally requires the provider to re-issue it, which single-trip travel plans typically don't support once the validity window has run. A still-valid, still-installed profile you haven't deleted keeps working fine across multiple connections within its own window; what doesn't happen is extending an already-expired plan by reinstalling it. A new trip needs a newly purchased plan with its own window, the same as buying a new co:sim eSIM for wherever you're headed next.

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A physical SIM can wear out from years of handling, but the far more common cause of "it just stopped working" on either format is a validity window or carrier inactivity rule running out, not the hardware giving up. Buy a fresh plan for each trip and neither clock has time to become a problem.