Product Specifications

Size

9.2 cm x 6 cm

System Compatibility
  • System Requirements: Supports Android 9.0 or higher.

  • Hardware Restrictions: Compatible with Android devices equipped with a physical SIM slot.
    Does not support carrier-locked devices (SIM-locked).

  • Management Tool: Must be used with the exclusive Mars eSIM App for downloading and switching data plans.

⚠️ Important Notice: Currently, all devices purchased in Mainland China and those running Huawei HarmonyOS are not supported.

eSIM Download Limits

Unlimited eSIM downloads

Storage

Store up to 10 plans (depending on actual file size)

Offline Management

Support for offline activation and deactivation

Mars eSIM Card Setup

Open the Mars eSIM App
Step 1

Open the Mars eSIM App

Open the Mars eSIM App and sign in.

Add Plan
Step 2

Add Plan

Tap “Plans”, then “Add Plan”.

Add eSIM
Step 3

Add eSIM

Choose a method to add your plan.

Scan the QR code in your order email.

Add eSIM
Step 3

Add eSIM

Choose a method to add your plan.

Enter the SM-DP+ Address and Activation Code from your order email, then tap “Next”.

Add eSIM
Step 3

Add eSIM

Choose a method to add your plan.

Save the QR code from your order email, then select it from your photos.

Add eSIM
Step 3

Add eSIM

Choose a method to add your plan.

Open “Orders” and select the plan you want to install.

For plans purchased from the Mars eSIM store.

Add eSIM
Step 3

Add eSIM

Choose a method to add your plan.

Tap “Activate Now”.

Download eSIM
Step 4

Download eSIM

Tap “Download” and wait for the download to finish.

Finish Setup
Step 5

Finish Setup

Tap “Not Now” if you haven’t arrived yet, or “Activate” if you have.

Select Your Plan
Step 6

Select Your Plan

Tap “Plans” and select your travel plan.

Activate Your Plan
Step 7

Activate Your Plan

Tap “Activate eSIM”.

Open SIM Settings
Step 8

Open SIM Settings

Open Settings and tap “SIM Cards & Mobile Network”.

Menu names may vary by device.

Set Up Mobile Data
Step 9

Set Up Mobile Data

Tap “Mobile data” and select the SIM slot containing your Mars eSIM Card.

If you’ve already selected your data SIM in the app, just check that it’s correct.

Open Mars eSIM Card Settings
Step 10

Open Mars eSIM Card Settings

Return to SIM settings and select the slot containing your Mars eSIM Card.

Turn On Roaming
Step 11

Turn On Roaming

Turn on “Roaming”.

FAQs

Need More Info? Visit Our FAQ.

What is the difference between a Mars eSIM Card and a standard SIM card?

Physically, they look identical and fit into the same SIM slot. The difference lies in their function: a standard SIM card is pre-linked to a specific carrier and data plan, whereas the Mars eSIM Card is a physical bridge that enables eSIM capabilities on your device. It arrives blank, allowing you to install and switch between international eSIM plans via an app. This effectively brings eSIM functionality to Android phones that don't natively support it.

Does the Mars eSIM Travel Card come with a pre-loaded data plan?

Yes! Before shipping, we will preload your selected 5G unlimited data plan onto the card.


Once you receive the card, simply insert it directly into your phone’s physical SIM slot. It will automatically connect to the network when you arrive at your destination, providing a true plug-and-play experience.

How soon must the preloaded plan be activated after purchase?

The preloaded plan must be activated within 90 days of the order date by connecting to the internet at a covered destination. If you do not connect to the local network within 90 days, the preloaded plan will expire. We recommend placing your order only after your travel itinerary has been confirmed.

Do I have to use the Mars eSIM App with the Mars eSIM Physical Card?

When using the preloaded unlimited data plan, downloading the App is not mandatory. You can access the internet immediately simply by inserting the card into your phone.However, we still recommend using it alongside the App as the interface allows you to monitor the plan's status and expiration date at any time.

Once the preloaded plan ends, you will need the Mars eSIM App if you wish to reuse the card to install and manage multiple new global plans.

Can I use it with an iPhone or iPad?

Yes, as long as your iPhone or iPad has a physical SIM slot, you can use the preloaded 5G unlimited data plan directly.


However, once the preloaded plan expires, you must switch to a compatible Android phone to install or manage additional plans through the Mars eSIM App, as these card management features are restricted to Android devices.

My phone has dual SIM slots. Can I use two Mars eSIM Cards at the same time?

• Each phone currently supports the installation of only one Mars eSIM physical card.

• The Mars eSIM physical card can store 8 to 10 different eSIM data plans.

• Whether for business or travel, you can switch plans anytime via the app without the need to swap physical cards.

What happens to my original number if my phone only has one SIM slot?

Since the Mars eSIM Card occupies the physical SIM slot, you will need to free it up to use our service. If you wish to keep your original number for calls, we recommend converting your primary number into an eSIM through your current carrier. (Many carriers offer the first conversion for free). Once the slot is empty, you can insert the Mars eSIM Card and enjoy its benefits.