What happens when a SIM card is defective?

When you get a new phone, the first thing you think about is inserting a physical SIM card or transferring your current card to your new device. But with the evolution of mobile technologies, is this practice still relevant? eSIMs are transforming this experience by making it entirely digital. Unlike physical cards […]

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  • 3 min read

When you get a new phone, the first thing you think about is inserting a physical SIM card or transferring your current card to your new device. But with the evolution of mobile technologies, is this practice still relevant? eSIMs transform this experience by making it entirely digital. Unlike traditional SIM cards, an eSIM is integrated directly into your phone. It requires no physical insertion or replacement to change operators or activate a plan. In a few clicks, you can download a data plan, activate it, and be connected immediately. Will we gradually abandon physical SIM cards?

How are SIM and eSIM cards similar?

Whether it’s a physical SIM card or an eSIM, their main function remains the same: to allow your device to access the mobile network. Here are their main uses:

  • Connecting to mobile networks to use cellular data.
  • Accessing messaging and calling services.
  • Identifying your device on your operator’s network.

In other words, a SIM card acts like a digital license plate, connecting your phone to the mobile network. However, the main difference lies in the format and flexibility of use. As an eSIM is entirely digital, it offers significant advantages over traditional SIM cards.

Dual SIM and multi-profile management

Utiliser une double SIM sur son téléphone

Many recent smartphones are compatible with Dual SIM functionality, allowing you to use a physical SIM card and an eSIM simultaneously, or even multiple eSIMs. Some practical uses of this technology 👇:

  • Add a local plan for mobile data when you travel while keeping your main number.
  • Use one plan dedicated to calls and another exclusively for internet browsing.
  • Manage a personal line and a professional line on the same phone.

With an eSIM, there’s no need to juggle multiple physical cards or lose them. You can store multiple eSIM profiles and switch between them directly from your phone’s settings.

Is your phone eSIM compatible?

To use an eSIM, your device must be compatible and unlocked. Here are a few ways to check:

  • Consult the list of eSIM-compatible devices.
  • Check with your operator if your phone is unlocked.
  • Go to your smartphone settings and search for « eSIM » or « digital SIM card. »
  • Dial *#06# on your phone and see if an EID number appears (which means your phone supports eSIM).

Why choose an eSIM?

1. Protection against physical damage

Since an eSIM is integrated into your phone, it is not at risk of breaking, scratching, or oxidizing like a traditional SIM card.

2. Enhanced security

Physical SIM cards can be stolen, cloned, or faked. An eSIM offers better protection against hacking and fraud.

3. Storage of multiple eSIM profiles

You can store multiple eSIM plans on your device and switch between them instantly, without having to insert or remove a physical card.

4. No more roaming fees

With Vostra, you can buy a local eSIM plan in over 200 countries and avoid excessive roaming fees.

5. Instant activation

No more waiting for a physical SIM card: the eSIM activates immediately after purchase by scanning a QR code.

Common problems with physical SIM cards

Physical SIM cards are exposed to several risks:

1. Water damage

Humidity, splashes, and immersion in water can corrode a SIM card’s connectors, rendering it unusable.

2. Heat sensitivity

Prolonged exposure to heat can damage a SIM card’s metal pins and cause malfunctions.

3. Shipping problems

SIM cards delivered by operators may be damaged during transport, which, of course, requires reshipment.

How to tell if your SIM card is faulty?

  • Your phone struggles to pick up a mobile network
  • SMS and calls don’t go through
  • Your device continuously tries to search for a network without success.

Frequently Asked Questions

Can a SIM card get damaged over time?
Yes, a SIM card can deteriorate over the years. Several factors can lead to malfunction, including natural wear and tear, excessive exposure to heat or cold, physical damage due to improper handling, or manufacturing defects. Repeated insertion or removal of the card can also accelerate its deterioration.
How do I know if my SIM card is faulty?
If your phone displays messages such as « No SIM card » or « Invalid SIM, » or if you experience recurring connection problems despite a functional network, it is possible that your SIM card is damaged or out of order.
How to clean a SIM card?
To clean a SIM card, use a soft, lint-free cloth. For a deeper clean, apply a small amount of isopropyl alcohol to the cloth before gently wiping the card. Make sure the SIM card is completely dry before reinserting it into your phone. Avoid using water, abrasive materials, or harsh solvents that could damage it.
What is a SIM card used for?
A SIM (Subscriber Identity Module) card allows mobile devices to identify themselves on a cellular network. It contains essential information such as the user’s identification number, network authentication data, and sometimes stored contacts. Thanks to it, you can make calls, send messages, and access the internet via mobile data.
What is the lifespan of a SIM card?
A SIM card is designed to last several years, but its longevity can be affected by various factors. Exposure to extreme temperatures, excessive handling, or manufacturing defects can reduce its lifespan and lead to premature malfunction.
Équipe de rédaction

bina launched an embarrassing travel blog at the age of 18 to document her insatiable hunger for deep cultural immersion, new flora and fauna, and … food! She relies on her phone at all times while she travels. Between her bird ID app, light meter app for her broken film camera, and good ol' Instagram, an eSIM gives her speedy mobile data to power her adventures.