Metamask wallet interface on smartphone screen with token list

The MetaMask interface on a smartphone displays a token list, showing how users manage crypto assets in the palm of their hand.

About this subject

MetaMask is one of the most popular wallets for interacting with the Ethereum blockchain and other EVM-compatible networks. Originally launched as a browser extension in 2016 by ConsenSys, the mobile version was introduced later, allowing users to access decentralized applications (dApps) and manage tokens directly from their smartphone. The interface shown in the image displays the token list, a core feature that organizes crypto assets such as ETH, stablecoins, and ERC-20 tokens. Each token appears with its balance and fiat value, updated in real time via price oracles. MetaMask is not an exchange but a non-custodial wallet: private keys are stored locally on the device, giving users full control over their funds. Security is reinforced by a password, seed phrase, and, on compatible devices, biometrics. In Brazil, MetaMask gained popularity with the growth of NFTs and DeFi, being used for token pre-sales, staking, and blockchain games. The mobile interface prioritizes simplicity, with tabs for tokens, NFTs, and transaction history, plus an integrated browser for navigating dApps. The token list can be customized: users add custom tokens by entering the contract address, symbol, and decimals. An important feature is automatic token detection, which scans the wallet for received assets, preventing unsolicited tokens (such as fraudulent airdrops) from appearing without permission. MetaMask also offers a built-in swap feature, allowing token exchanges directly in the wallet, with network fees (gas fees) displayed before confirmation. Despite its convenience, users must be aware of scams: MetaMask never asks for the seed phrase via message or email, and visiting malicious sites can compromise the wallet.

Frequently Asked Questions

How do I add a custom token in MetaMask?

In the 'Tokens' tab, scroll down and click 'Import tokens'. Paste the token's contract address, usually found on the project's official site or on blockchain explorers like Etherscan. The symbol and decimals are auto-filled. Confirm and the token will appear in the list.

Is MetaMask safe for storing cryptocurrencies?

Yes, as long as you protect your seed phrase and do not share it. MetaMask is a non-custodial wallet, meaning you control your private keys. However, it is vulnerable to malware and phishing if your device is compromised. Hardware wallets are recommended for large amounts.

Why do some tokens show as 'unknown value' in the list?

This happens when MetaMask cannot fetch the token's price from its oracles. It may be a very new token, one with low liquidity, or a malicious contract. Verify the contract address on a trusted explorer before interacting.