# Attach Polkadot Vault (prev. Parity-Signer) accounts

Polkadot Vault is a cold storage solution that turns your iOS or Android device into a dedicated hardware wallet for Substrate-based networks. Your keys are kept secure (i.e., offline) at all times, and transactions are signed in an air-gapped way via QR codes.

{% hint style="warning" %}
We advise you to create a backup of your recovery phrase and update to the latest version of Polkadot Vault if you are utilizing Parity Signer (an older version of the app before its rebranding).
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**Here are the articles in this section:**

{% content-ref url="attach-polkadot-vault-prev.-parity-signer-accounts/add-networks-to-polkadot-vault" %}
[add-networks-to-polkadot-vault](https://docs.subwallet.app/main/mobile-app-user-guide/cold-wallet-management/attach-polkadot-vault-prev.-parity-signer-accounts/add-networks-to-polkadot-vault)
{% endcontent-ref %}

{% content-ref url="attach-polkadot-vault-prev.-parity-signer-accounts/update-network-metadata" %}
[update-network-metadata](https://docs.subwallet.app/main/mobile-app-user-guide/cold-wallet-management/attach-polkadot-vault-prev.-parity-signer-accounts/update-network-metadata)
{% endcontent-ref %}

{% content-ref url="attach-polkadot-vault-prev.-parity-signer-accounts/attach-account" %}
[attach-account](https://docs.subwallet.app/main/mobile-app-user-guide/cold-wallet-management/attach-polkadot-vault-prev.-parity-signer-accounts/attach-account)
{% endcontent-ref %}