Question 1

What is an eSIM?

Accepted Answer

An eSIM is a digital SIM built into your phone. Instead of inserting a plastic SIM card, you install a mobile data plan by scanning a QR code — so you can get online abroad without swapping cards.

Question 2

How is an eSIM different from a physical SIM?

Accepted Answer

A physical SIM is a removable chip; an eSIM is embedded in your device and provisioned by software. With an eSIM you can store several plans at once and switch between them in settings, with no shipping or card swapping.

Question 3

Do I need Wi-Fi to use a Zesimer eSIM?

Accepted Answer

You need internet (Wi-Fi or another data connection) once, to install the eSIM. After that it provides your mobile data and no Wi-Fi is required. We recommend installing while on Wi-Fi before you travel.

Question 4

Does an eSIM give me a phone number?

Accepted Answer

Our travel eSIMs are data-only — they provide mobile internet but not a local phone number. Your existing SIM keeps your number for calls and texts, and you can use apps like WhatsApp over the data.

Question 5

Is my phone compatible with an eSIM?

Accepted Answer

Most phones released from 2019 onward support eSIM, including iPhone XS and newer, Google Pixel 3 and newer, and recent Samsung Galaxy S, Note and Z models. Use the Compatibility button on any plans page to see the full list.

Question 6

Does my phone need to be unlocked?

Accepted Answer

Yes. Your device must be carrier-unlocked to use a Zesimer eSIM. If you bought your phone outright or it's fully paid off, it's usually unlocked — check with your carrier if unsure.

Question 7

Can I use an eSIM on a tablet or smartwatch?

Accepted Answer

Many cellular iPads and some smartwatches support data eSIMs. Check your device's settings for an “Add eSIM” or “Add data plan” option, and confirm your exact model on our compatibility list.

Question 8

How do I choose the right plan?

Accepted Answer

Pick a local plan for one country, a regional plan for a multi-country trip, or a global plan if you travel widely. Then choose the data amount and validity that fit how long you'll be away and how much you'll use.

Question 9

How much data do I need?

Accepted Answer

For maps and messaging, 1 GB lasts several days. For daily browsing, social media and the occasional video, plan on 1–2 GB per day. For heavy streaming or tethering, choose a larger or unlimited daily plan.

Question 10

What's the difference between total and daily data?

Accepted Answer

A total-data plan gives you one pool to use across the whole period at your own pace. A daily-data plan gives you a fresh allowance every 24 hours that resets each day — ideal if you want consistent daily usage.

Question 11

When does my plan's validity start?

Accepted Answer

Validity begins the first time your eSIM connects to a network in your destination — not when you buy it. That means you can purchase and install days in advance without losing any time.

Question 12

How do I install my eSIM?

Accepted Answer

After checkout you'll receive a QR code by email and in your account. On your phone, go to Settings → Mobile/Cellular → Add eSIM, then scan the QR code. The whole process takes under a minute.

Question 13

When should I install and activate?

Accepted Answer

Install while you still have Wi-Fi, ideally before you fly. Activation (when validity starts) usually happens automatically when the eSIM connects to a network at your destination, so you don't lose days by installing early.

Question 14

Do I need to change any settings when I arrive?

Accepted Answer

Yes — set the Zesimer eSIM as your mobile data line and turn on data roaming for that line (this just lets it use the local partner network; you won't be charged roaming fees). Your home line can stay on for calls and texts.

Question 15

Can I keep my regular SIM active too?

Accepted Answer

Yes. Your physical SIM and the eSIM run side by side. Keep your home SIM for calls and texts and use the eSIM for data — just set the eSIM as your data line.

Question 16

Can I top up if I run out of data?

Accepted Answer

On plans that support top-ups, you can add more data from your account in a few taps without installing a new eSIM. The plan's details show whether top-up is available.

Question 17

Can I reuse my eSIM on another trip?

Accepted Answer

Many plans can be topped up and reused for future trips to the same destination or region. If a plan has fully expired, you can simply buy a new one.

Question 18

What payment methods do you accept?

Accepted Answer

We accept major credit and debit cards. Your eSIM is delivered instantly after a successful payment — there's nothing to ship.

Question 19

Can I get a refund?

Accepted Answer

If you haven't installed or used an eSIM, you can request a refund within 30 days of purchase. Once an eSIM has been installed or data has been used, it can no longer be refunded.

Question 20

I was charged but didn't receive my eSIM — what now?

Accepted Answer

Check your account and spam folder first, as delivery is instant. If it still hasn't arrived, contact our support team with your order details and we'll resend it or resolve the issue quickly.

Frequently asked questions

eSIM basics

Compatibility

Buying & plans

Installation & activation

Using your eSIM

Billing & refunds