10 eSIM Myths Debunked: What Travelers Get Wrong

Quick Answer

Most concerns about eSIM are outdated or flat-out wrong. An eSIM does not drain your battery faster than a physical SIM, does not require internet to stay active, works alongside a physical SIM for true dual-SIM capability, and is actually more secure than a traditional SIM card. Below, we address the 10 most common myths with facts.

Browse eSIM plans for 175+ countries on e-sim.onl →

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Myth 1: eSIM Drains Your Battery Faster

The truth: An eSIM uses the same amount of power as a physical SIM card.

The eSIM chip is a tiny piece of hardware soldered into your phone’s motherboard. It draws the same power as a traditional SIM card slot — essentially negligible compared to your screen, processor, or cellular radio.

What actually drains your battery while traveling:

Battery drain source	Impact	vs. eSIM
Screen brightness	30–50% of total drain	Thousands of times more than eSIM
GPS / navigation	Significant	Far more than eSIM
Cellular radio (searching for signal)	Moderate	Same whether using eSIM or physical SIM
Camera and photo processing	Moderate	Far more than eSIM
eSIM chip	Negligible	~0.01% of total battery use

If you notice worse battery life abroad, it’s because your phone is working harder to maintain a cellular connection in areas with weaker signal — not because of the eSIM. This happens identically with a physical SIM.

Running dual SIM (physical + eSIM simultaneously) does use slightly more power than a single SIM, because your phone maintains two cellular connections. But the difference is roughly 3–5% over a full day — barely noticeable.

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Myth 2: eSIM Needs Internet to Work at All Times

The truth: You need internet only once — to download and install the eSIM profile.

Here’s how it actually works:

1. Purchase and receive QR code — needs internet (do this at home over Wi-Fi)
2. Scan QR code and download profile — needs internet (one-time download, takes ~30 seconds)
3. Use the eSIM — no internet needed to maintain the profile; it’s stored on your device

Once installed, the eSIM profile lives on your phone’s embedded chip. It persists through airplane mode, restarts, and power-offs. You could install an eSIM over Wi-Fi, turn off your phone for a week, fly to another continent, and it would activate when you turn it on and enable it.

The only exception: If you need to reinstall a deleted eSIM profile, you’ll need internet access to re-download it. This is why we recommend backing up your QR code.

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Myth 3: You Can’t Use Two SIM Cards at the Same Time

The truth: eSIM enables true dual-SIM functionality on most modern phones.

This is actually one of the biggest advantages of eSIM. With a physical SIM in the tray and an eSIM activated, your phone operates as a dual-SIM device:

Line	Use for	Example
Physical SIM (home)	Voice calls, SMS, two-factor auth	Keep your home number active
eSIM (travel)	Data	Browse, navigate, message over apps

You can receive calls on your home number while using your travel eSIM for data. Your phone manages both connections simultaneously.

iPhone specifics: iPhone 13 and newer support two active eSIMs simultaneously (no physical SIM required). iPhone XS through iPhone 12 support one physical SIM + one eSIM. iPhone 14 US models have no physical SIM tray — they use dual eSIM exclusively.

Android specifics: Most eSIM-capable Android phones support one physical SIM + one eSIM. Some newer models (Pixel 7+, Samsung Galaxy S23+) support dual eSIM.

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Myth 4: eSIM Plans Are More Expensive Than Physical SIM Cards

The truth: eSIM plans are price-competitive, and often cheaper when you factor in the full cost.

A direct price comparison:

Destination	eSIM (5 GB)	Airport SIM (5 GB equivalent)	Hidden costs of physical SIM
Japan	$14.99	~$15–20	30-min queue, possible activation issues
Thailand	$8–12	~$8–15	Taxi to SIM shop if not at airport
UK	$9–14	~$10–15 (PAYG top-up)	Store visit, passport may be required
USA	$12–18	~$15–25	Finding a store, activation wait

The raw per-GB price is often similar. But physical SIMs have hidden costs:

• Time: 30–60 minutes buying and activating a SIM at arrival
• Transportation: Getting to a SIM shop if airport options are sold out
• Minimum purchase: Many local SIMs require a minimum plan larger than what you need
• Leftover credit: Unused balance on a local SIM is wasted money
• SIM card tool: Tiny tool to open the SIM tray (easy to lose)

eSIM also lets you comparison-shop from home before your trip, rather than accepting whatever’s available at the airport counter.

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Myth 5: Setting Up eSIM Is Complicated

The truth: eSIM setup takes about 3 minutes and involves scanning a QR code.

The complete process:

1. Buy a plan on e-sim.onl (2 minutes)
2. Receive QR code via email (instant)
3. Open phone settings, tap “Add eSIM” (10 seconds)
4. Scan QR code (5 seconds)
5. Wait for download (30 seconds)
6. Done

Compare that to a physical SIM:

1. Find a SIM shop or airport counter (5–30 minutes)
2. Choose a plan and pay (5 minutes)
3. Wait for staff to activate (5–10 minutes)
4. Eject your SIM tray with a tool (1 minute)
5. Insert new SIM, store old SIM safely (2 minutes)
6. Wait for network registration (1–5 minutes)
7. Configure APN settings if needed (2–5 minutes)

The eSIM process is objectively simpler. The only learning curve is doing it for the first time — after that, it’s routine.

Step-by-step iPhone setup guide → | Samsung setup guide →

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Myth 6: eSIM Is Not Secure

The truth: eSIM is more secure than a physical SIM card.

Physical SIM cards have well-known security vulnerabilities:

Threat	Physical SIM	eSIM
SIM swapping attack	Possible — attacker convinces carrier to transfer your number to a new SIM	Much harder — eSIM profiles are cryptographically bound to your device
Physical theft	Someone can remove and clone your SIM	Cannot be physically removed; requires device access + authentication
Interception during shipping	SIM cards can be intercepted in the mail	No physical card shipped — profile delivered digitally
Loss while traveling	Tiny card, easy to lose	Embedded in your phone, can’t be lost separately

eSIM profiles are protected by the GSMA Remote SIM Provisioning standard, which uses public-key cryptography to ensure that only your specific device can use the downloaded profile. The profile is stored in a secure element on your phone — the same type of hardware security used for Apple Pay and Google Pay.

For travelers specifically: Physical SIM theft is a real concern in some destinations. Pickpockets targeting phones can also take your SIM. With an eSIM, even if your phone is stolen, the eSIM profile is locked to that device’s secure element and can’t be transferred to another phone.

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Myth 7: eSIM Only Works on the Newest Phones

The truth: eSIM has been available since 2018 on iPhones and since 2019 on most major Android brands.

Here’s a timeline of eSIM support:

Year	Devices	That makes it…
2018	iPhone XS, XR, Google Pixel 3	8 years old
2019	Samsung Galaxy S20 series (announced late 2019), Google Pixel 3a/4	7 years old
2020	Samsung Galaxy S20, Motorola Razr, Huawei P40	6 years old
2021	Samsung Galaxy S21, Google Pixel 5a/6	5 years old
2022+	Nearly all flagship and mid-range phones	Standard feature

If your phone is from 2020 or later and was a mid-range or flagship model, it almost certainly supports eSIM. Even budget phones from brands like Samsung (Galaxy A series from 2022+) now include eSIM.

The main exception: Some phones sold through specific carriers or in certain markets may have eSIM hardware disabled. Check Settings > Connections/Cellular to verify.

Check your device compatibility →

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Myth 8: You Can’t Switch Providers Easily with eSIM

The truth: Switching is faster with eSIM than with physical SIM.

With a physical SIM, switching providers means going to a store, buying a new card, ejecting your tray, swapping cards, and storing the old one somewhere safe. With eSIM:

1. Buy a new plan online (2 minutes)
2. Install the new eSIM profile (1 minute)
3. Set the new profile as your active data line (10 seconds)
4. Old profile stays installed but inactive — reactivate it anytime

You can store multiple eSIM profiles on your device:

Phone	Max eSIM profiles stored
iPhone XS–12	5+ profiles (1 active at a time alongside physical SIM)
iPhone 13+	8+ profiles (2 active simultaneously)
Samsung Galaxy S21+	5+ profiles
Google Pixel 6+	7+ profiles

For a multi-country trip, you could install eSIM profiles for Japan, South Korea, and Thailand before leaving home, then activate each one as you arrive in each country. No SIM shopping, no tray ejections, no tiny cards to keep track of.

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Myth 9: eSIM Data Speeds Are Slower Than Physical SIM

The truth: eSIM data speeds are identical to physical SIM on the same network.

The eSIM chip connects to the same cell towers, using the same radio frequencies, at the same speeds as a physical SIM. The cellular radio in your phone doesn’t know or care whether the SIM profile is stored on a removable card or an embedded chip.

Speed tests confirm this repeatedly:

Metric	Physical SIM	eSIM	Difference
Download speed	Determined by network/plan	Identical	None
Upload speed	Determined by network/plan	Identical	None
Latency	Determined by network/plan	Identical	None
5G access	If plan supports it	If plan supports it	None

What actually affects your speed:

• Which network your plan uses — a plan on a major carrier (like NTT Docomo in Japan or stc in Saudi Arabia) will be faster than one on a small MVNO
• Your plan’s speed cap — some budget plans throttle speeds to 3G levels
• Network congestion — peak hours in crowded areas slow everyone down
• Your phone’s hardware — older phones may not support the latest network bands

If you experience slow speeds on eSIM, it’s the network or plan, not the eSIM technology itself.

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Myth 10: There’s No Customer Support for eSIM

The truth: Reputable eSIM providers offer full customer support — often better than airport SIM vendors.

The “no support” myth likely comes from the early days of eSIM when the technology was new and few providers existed. In 2026, established providers like e-sim.onl offer:

Support aspect	Airport SIM counter	eSIM provider (e-sim.onl)
Pre-purchase help	Limited, in-person only	Email
Setup assistance	In-person at time of purchase	Guides, email — anytime
Troubleshooting abroad	Return to a store (may not exist near you)	Remote support available globally
Refund policy	Varies, often none	Clear refund policy
Hours	Store hours only	Email support
Language	Local language, possibly English	English support guaranteed

The practical advantage: if something goes wrong with an airport SIM card in rural Japan at 10 PM, you have no recourse until a store opens. With an eSIM provider, you can reach support from anywhere with an internet connection.

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The Bottom Line

eSIM is not a bleeding-edge experiment. It’s a mature, standardized technology used by hundreds of millions of people worldwide. The myths around it persist largely because the technology is still unfamiliar to many travelers — not because of actual limitations.

Summary of what’s true about eSIM:

Concern	Reality
Battery drain	Same as physical SIM
Internet required	Only for initial install
Dual SIM	Works — that’s the point
Price	Competitive, often cheaper overall
Setup difficulty	3 minutes, scan a QR code
Security	More secure than physical SIM
Phone compatibility	Available since 2018
Provider switching	Faster and easier than physical SIM
Speed	Identical to physical SIM
Support	Full support from reputable providers

Get started with your first travel eSIM on e-sim.onl →

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Frequently Asked Questions About eSIM

Is eSIM the future of SIM cards?

Yes. Major phone manufacturers are already moving toward eSIM-only devices. The iPhone 14 (US model) has no physical SIM tray. Within the next few years, most flagship phones globally are expected to go eSIM-only.

Can my carrier tell I’m using an eSIM?

Your carrier knows which type of SIM profile you’re using, but it makes no difference to your service. There are no penalties or restrictions for using eSIM versus physical SIM.

What happens to my eSIM if my phone breaks?

If your phone is damaged or lost, you’ll need to contact your eSIM provider to reissue the profile for your replacement device. This is similar to getting a replacement physical SIM, but can be done remotely without visiting a store.

Can I transfer my eSIM to a new phone?

Some carriers and providers support eSIM transfer between devices. For travel eSIMs, it’s usually simpler to delete the old profile and install a new one on the new device using your QR code or provider account.

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Related

• Browse eSIM Plans for 190+ Countries
• Is eSIM Safe? Security Guide
• eSIM Setup Guide for iPhone
• eSIM Setup Guide for Samsung
• eSIM Troubleshooting Guide
• Best Travel eSIM Providers Compared (2026)
• Compatible Devices