> ## Documentation Index
> Fetch the complete documentation index at: https://help.2chip.app/llms.txt
> Use this file to discover all available pages before exploring further.

# When should I buy and install my eSIM?

> Find out whether your eSIM plan starts at purchase, installation, or first network connection.

Buying an eSIM, installing it, and starting its validity are not always the same thing.

**Check the activation rule in the details of your specific package before installing it.**

## What starts the validity period?

| Activation rule | When the countdown begins |
| - | - |
| **First connection to a supported network** | When the eSIM first connects to an eligible mobile network |
| **Installation** | When you add the eSIM profile to your phone |
| **Purchase** | After the purchase is completed, even if you haven't installed the eSIM |

There isn't one activation rule for every 2Chip plan.

## When should I buy it?

If your package activates on **first network connection**, buying it in advance doesn't by itself start the package's usage period.

If it activates **on purchase**, the validity period starts even while the eSIM is still uninstalled. Avoid buying too far ahead.

Also check whether the package has a separate deadline for first use. This depends on the offer.

## When should I install it?

* **First network connection:** installation before departure may be convenient, provided the package conditions allow it.
* **Installation:** wait until you're ready for the validity period to begin.
* **Purchase:** installation timing doesn't delay the countdown.

You need an existing internet connection, such as Wi-Fi, to download and install an eSIM. It's better not to leave installation until you're somewhere without another connection.

## I've installed it. Has the plan started?

Not necessarily. Installation alone doesn't start a package that activates on first connection to a supported network.

Check the activation rule and any available status or expiry information in your package details.

> [!WARNING]
>
> Don't delete an installed eSIM just because the activation status is unclear. Reinstallation may not be possible for that profile.

> [card] [Install your eSIM](https://help.2chip.app/en/installation/overview.md)
>
> iPhone and Android instructions, QR code and manual installation.


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