PrepaideSIM FAQ: Common Questions Answered
- Getting Started
- Buying & Activation
- Usage Tips
- Troubleshooting
- Pricing & Value
Getting Started
What is eSIM and how does it work?
What is an eSIM?
An eSIM (embedded SIM) is a digital SIM built into your phone. It works exactly like a physical SIM card but is activated by scanning a QR code instead of inserting a plastic card. You can add a travel data plan in minutes without visiting a store or swapping SIMs.
Which phones are compatible with eSIM?
Every iPhone from the XS (2018) onward, Samsung Galaxy S20 (2020) and newer, Google Pixel 3 (2018) and newer, and most Android flagships released after 2021. Your phone must also be carrier-unlocked. Check Settings for an EID number or dial *#06# to confirm.
How does a travel eSIM work?
You buy a prepaid data plan online, receive a QR code by email, scan it in your phone settings, and the eSIM profile installs in about 90 seconds. When you arrive at your destination, the eSIM connects to a local carrier network automatically. Your home SIM stays active for calls and texts.
Is eSIM the same as a SIM card?
An eSIM does the same job as a physical SIM card: it identifies your device on a mobile network and provides data, calls, or texts. The difference is physical. A SIM card is a removable plastic chip. An eSIM is a chip soldered into your phone that you program remotely via QR code.
Buying & Activation
How to buy and activate a travel eSIM
Where do I buy a travel eSIM?
Buy online from a prepaid eSIM provider like Airalo, Holafly, Saily, or Nomad. Choose your destination country, pick a data plan, pay online, and receive a QR code by email within minutes. No store visit required.
How do I activate an eSIM?
On iPhone: go to Settings, then Cellular, then Add eSIM, and scan the QR code. On Android: go to Settings, then Connections or Network, then SIM Manager, then Add eSIM, and scan the QR code. The profile downloads in about 90 seconds over WiFi.
Do I need WiFi to install an eSIM?
Yes. You need an internet connection to download the eSIM profile. Install over WiFi at home before you leave for the airport. Airport WiFi can work but is often unreliable or requires phone verification, which creates a catch-22 without data.
Can I install the eSIM before my trip?
Yes, and you should. Install the eSIM at home over WiFi, then keep data roaming toggled off for the travel line until you land. Most plans start counting days from the first network connection, not from installation. Pre-installing saves time and avoids WiFi problems at the airport.
What if the QR code does not scan?
Increase screen brightness on the device showing the QR code. Clean your camera lens. Make sure you are scanning from Settings, not the regular camera app. If scanning still fails, most providers offer a manual activation code you can type into Settings as an alternative.
Usage
Using your eSIM while traveling
How much data do I need for a trip?
Most travelers use 500 MB to 1.5 GB per day for maps, messaging, and light browsing. A 7-day trip typically needs 3-5 GB. Heavy video streaming or video calls can burn 3+ GB per day. Download offline maps before departure to reduce data use by 30-50%.
Can I use eSIM for hotspot tethering?
It depends on the provider and plan. Airalo and Nomad allow hotspot on most plans with data counting against your total. Holafly limits hotspot to about 1 GB per day on unlimited plans. Saily allows tethering on all fixed-data plans. Check the plan details before buying if you plan to tether a laptop.
Can I use my home number and eSIM at the same time?
Yes. Most eSIM-compatible phones support dual SIM: your home SIM stays active for calls and texts while the travel eSIM handles data. Set the travel eSIM as your default data line and keep your home SIM as the default for voice and messaging.
Does eSIM work for phone calls and texts?
Most travel eSIM plans are data-only. You make calls and send texts through apps like WhatsApp, FaceTime, or Telegram using the eSIM data connection. Your home SIM stays active for receiving calls and SMS. Some providers offer voice-enabled plans at higher prices.
Troubleshooting
Fixing common eSIM problems
My eSIM is not connecting after landing. What do I do?
First, check that data roaming is enabled for the travel eSIM line in Settings. Second, make sure the travel eSIM is set as your default data line. Third, toggle airplane mode on and off to force a network search. Fourth, restart your phone. If it still does not connect, manually select a network operator in Settings.
Can I delete and reinstall an eSIM?
You can delete an eSIM profile from your phone, but reinstalling it requires a new QR code from your provider. Some providers allow one free re-download. Others require you to purchase a new plan. Contact your provider support before deleting an active eSIM profile.
My data is slow. How do I fix it?
Check your remaining data balance in the provider app. If you are on an unlimited plan, you may have hit the daily fair-use threshold, which throttles speeds to 256 Kbps. Try toggling airplane mode to switch to a different cell tower. In areas with poor signal, move to higher ground or an open area.
Pricing & Value
eSIM costs and savings
Is a travel eSIM cheaper than carrier roaming?
Almost always. Major US carriers charge $6-12 per day for international roaming. A 7-day trip costs $42-84 in roaming fees. A prepaid eSIM for the same trip costs $5-25 depending on data amount and destination. The savings are 50-90% compared to carrier roaming.
Can I get a refund if I do not use my eSIM?
Refund policies vary by provider. Holafly offers a 6-month refund on unused plans. Saily offers 30 days. Airalo offers 14 days. Nomad offers 30 days. All require that the eSIM profile has not been installed or activated. Check the provider refund policy before purchase.
Do prepaid eSIM plans work across multiple countries?
Some do. Airalo offers regional bundles covering multiple countries: Asialink (16 countries), Eurolink (39 countries), and Discover Global (130+ countries). Holafly also offers multi-country plans for popular regions. Single-country plans from Nomad and Saily cover one destination only.
Is an eSIM worth it for a weekend trip?
Yes. Even a 1 GB plan for 3 days costs $4-6 from most providers. Compare that to a $10/day carrier roaming fee ($30 for a weekend) or a $15-30 airport SIM with a 20-minute queue. For any trip where you need data, a prepaid eSIM is the fastest and cheapest option.
Explore
Guides and resources
Detailed guides for activation, device compatibility, and destination-specific eSIM plans.
FAQ content last updated Updated June 2026. Answers are based on our independent testing across 12+ destinations and 4 prepaid eSIM providers. Provider policies may change. Always verify details on the provider website before purchasing. Read our editorial policy.