FAQ

General

When I export my seed phrase from Blast Mobile, the resulting wallet address doesn't match my Blast Mobile wallet address. What gives?

During setup, Blast Mobile creates a new smart wallet for you, secured with passkey authentication.

Unlike externally owned accounts (EOAs), which are derived from a seed phrase and use a private key to sign transactions, smart wallets are deployed as smart contracts on the blockchain. Since smart wallets do not have private keys, they rely on an externally owned account (EOA) as a ‘signer’ to authorize transactions.

The seed phrase you can export from Blast Mobile belongs to this signer account, not the Blast Mobile smart wallet itself.

My device is up to date, but I'm seeing an 'Old device detected...' error when setting up Blast Mobile

Blast Mobile uses passkey authentication, which requires your device to support passkey creation and backup.

• On iOS: Ensure that iCloud is enabled and that iCloud Keychain is set up to back up your passkeys securely.
• On Android: Confirm that your device is configured to use Google Password Manager for storing and managing passkeys.

See the FAQ section below on Passkey Authentiction for more info.

What happens if I uninstall Blast Mobile or lose my phone? Will I lose access to my Blast Mobile wallets?

Your Blast Mobile wallets are linked to the passkey created during setup. As long as you retain access to your passkey, your wallets can be recovered. Passkeys are securely backed up to iCloud Keychain (for iOS) or Google Password Manager (for Android), allowing you to restore access on any device signed in with the same Apple or Google account.

Why can't I import my Externally Owned Account (EOA) to Blast Mobile?

Blast Mobile is designed to simplify and improve the user experience when interacting with dapps. Its smart wallets enable passkey authentication, eliminate the need to manage private keys, let us sponsor gas for your transactions, and allow seamless transactions without confirmations using Pro Mode.

To maintain these benefits, Blast Mobile does not currently support importing EOAs, as they can’t take full advantage of these features. However, we understand this may be a significant change from your previous experience and are exploring the possibility of enabling EOA imports in a future update.

What is 'Pro Mode'?

Enabling Blast Mobile’s Pro Mode allows you to interact with trusted dapps in Blast Mobile without having to confirm/sign transactions for a smoother user experience.

Where are all the dapps? I only see a few in Blast Mobile.

Blast Mobile’s initial launch focuses on helping users get familiar with the platform and introducing our updated tokenomics through the Earn App.

We are actively working with dapps across the Blast ecosystem and will be rolling out their integrations on Blast Mobile soon. Stay tuned!

Do I still earn native yield on ETH, WETH, and USDB on Blast?

Yes! There have been no changes to Blast’s native yield. You will continue to earn yield on ETH, WETH, and USDB as before. Native yield is earned in the same currency as your balance—for example, ETH on your ETH balances and USDB on your USDB balances.

This differs from the Earn App, a new yield-earning opportunity launched with Blast Mobile. By depositing USDB into the Earn App, you can earn a significantly higher APY (50%+). However, yield from the Earn App is paid in BLAST.

Earn App

How do I start earning liquid BLAST rewards on the Earn App?

See our Earn App Overview for step-by-step instructions on getting started.

Does the Earn App allow me to earn yield on USDB, BLAST, or both?

In the Earn App, you earn yield only on your USDB deposits, but the yield is paid out in BLAST.

For example, if you earn $100 of yield on your USDB deposits, you would receive that yield as $100 worth of BLAST.

While your BLAST balance doesn’t earn yield in the Earn App, it does affect your multiplier, which can boost your earnings. Check related FAQs on maximizing your multiplier for more details.

When can I withdraw USDB or BLAST I've deposited into the Earn App?

You can withdraw your USDB and BLAST at any time. BLAST rewards earned through the Earn App are liquid and can be withdrawn / sold as soon as you’ve earned them.

Please note that withdrawing any amount of BLAST from the Earn App will reset your multiplier to 1x.

How is my multiplier determined in the Earn App?

Your multiplier starts at 1x and increases linearly to 6x based on the relative value (denominated in USD) of BLAST to USDB that you’ve deposited into the Earn App.

You will reach the maximum multiplier of 6x when your BLAST deposits are equivalent in value to 30% of your USDB deposits.

How much BLAST do I need to deposit into the Earn App to maximize my multiplier?

The amount of BLAST required to maximize your multiplier is relative to how much USD you’ve deposited into the Earn App.

To maximize your multiplier, your BLAST balance needs to be equivalent to 30% of the value of your USD deposit.

What can cause my multiplier to change?

• New USDB deposits: Your multiplier may go up or down depending on the ratio of your total BLAST (in USD) to USDB.
• New BLAST deposits: Adding more BLAST will always raise or maintain (but never reduce) your current multiplier.
• Earning BLAST over time: As you earn BLAST rewards in the Earn App, your BLAST balance grows while your USDB balance stays the same, automatically increasing your multiplier over time.

If the price of BLAST decreases, will my multiplier decrease? How does current BLAST price impact my multiplier?

Your multiplier will not automatically decrease when BLAST’s price goes down. The price of BLAST only matters if you make additional deposits of USDB or BLAST, at which point the app checks BLAST’s price (via an oracle) to recalculate your multiplier.

• When you deposit more USDB: Your multiplier may drop if your BLAST-to-USDB ratio (in USD) has gotten smaller—either because of (a) the extra USDB, (b) a lower BLAST price since last deposit, or both.
• When you deposit more BLAST: The current price is used to determine how much extra BLAST value you’re adding compared to your USDB deposits. This never reduces your existing multiplier—only boosts it or leaves it unchanged.

If you do not deposit or withdraw, BLAST price changes alone will not affect your multiplier.

Passkey Authentication

What is a passkey?

A passkey is a secure, passwordless login method that lets you sign in using your device’s biometrics (like Face ID or a fingerprint). It’s easy to use, resistant to phishing, and your login information is safely stored on your device and backed up in iCloud or Google Password Manager for seamless access across devices.

Does Blast Mobile support 1Password, Proton Pass, or other similar products for passkey management?

No, Blast Mobile currently only supports:

• iOS Users: iCloud Keychain
• Android User: Google Password Manager