About the network Pitfalls How to send FAQ
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ETH, tokens and DeFi — gas visible before you sign

Wallet for Ethereum

Ethereum is the network of tokens and DeFi, where every action costs gas in ETH. In Mitilena you see how much gas you need before you sign, and the screen shows whether it is a transfer or an “approval.” A free wallet in 30 seconds, no KYC.

Create a free ETH wallet Network pitfalls
Free, no sign-up 18 networks in one app Offline signing on a card
Ξ
Network passportEthereum · ETH
CoinETH
Address0x…, 40 hex characters
Feegas × gas price, from cents to tens of $
Gas for tokensneed ETH on the address
Confirmation12 s block, exchanges wait minutes
Memo / tagnone
TokensERC-20: USDT, USDC, thousands
FreezeUSDT, USDC — issuer can; ETH — nobody
About the network
Ξ

Ethereum

since 2015 · EVM, main network

Why Ethereum, who needs it, and how this network’s rules differ from the rest — short and to the point.

What for
Hold ETH and tokens, work with DeFi, NFTs and contracts. The network with the deepest liquidity after Bitcoin — and gas you want to see before you sign.
Who uses it
Anyone who holds stablecoins “on the most trusted network,” trades on a DEX, or receives tokens from projects.
Quirk
One address — all tokens and all EVM networks. Every action costs gas in ETH, and the gas price changes every minute.
Pitfalls

Four Ethereum rules worth knowing before you send

Not abstract “crypto risks,” but the rules of this network. For each — what happens, and how Mitilena shows it before the Send button.

Pitfall 01

You have USDT — you cannot send without ETH

ERC-20 tokens do not pay for themselves. The fee for a USDT transfer is taken in ETH from the same address: if ETH is zero, USDT goes nowhere. Classic: you withdrew USDT from an exchange and cannot move it.

How we do it
Before you sign we show how much ETH you need for gas. If it is short — we warn you. A little ETH can be bought with a swap inside the wallet.
Pitfall 02

Approval (approve) is a key to your tokens

Signing “approve” gives a contract the right to move your tokens. An unlimited approval to a stranger’s site — and tokens can leave without a new signature. Drainers collect millions this way.

How we do it
On the signing screen — the operation type in words: transfer, contract call, approval — and a reject button. Do not sign approvals for sites you do not trust.
Pitfall 03

Same address, wrong network

Your 0x address is the same on Ethereum, Arbitrum, Base, BNB Chain and Polygon. A transfer “to Ethereum” to an address “for Arbitrum” goes the wrong way. Plus look-alike addresses in history — copy only from the recipient.

How we do it
In Mitilena the network is chosen explicitly, the address is shown in full. Copy from the recipient’s message, not from history.
Pitfall 04

Stuck transaction and the nonce queue

Ethereum transactions go by number. One with a low gas price stuck — and every next one waits behind it. You cannot cancel: only replace with the same number and a higher price.

How we do it
The “Replace stuck transaction” button — a replacement with the same nonce and a higher gas price, so the queue clears.
How to send

How to send ETH in Mitilena

01
Paste a 0x… address. Make sure the recipient expects the transfer on Ethereum, not on Arbitrum or Base.
02
Pick the coin: ETH or a token. For a token the address needs ETH for gas — Mitilena shows how much.
03
Set the gas price with the slider: total in money and wait time.
04
On the signing screen check the operation type: a transfer, not an “approval.” Then sign.
05
Confirmation — seconds to minutes. If it stalls — “Replace stuck transaction.”
What happens to the key and what our server sees — step by step on How a transfer leaves.
Send ETHEthereum
To
0x…
Amount
0.00 ETH≈ $0
Gasgas price slider in gwei, total in $
as in the wallet
ETH balanceneeded even to send USDT
network quirk
!The “Replace stuck transaction” button appears if the transfer does not confirm
Continue
Send-form mock: fields and hints that appear specifically for the Ethereum network.
Tokens

Tokens on Ethereum: ERC-20

USDT across networks — what is USDT.
What there is
USDT and USDC on Ethereum are the most liquid stablecoin versions; plus thousands of project tokens. The list and contracts come from the wallet database; you can add a token by contract address.
Gas
Every token transfer is paid in ETH. Without ETH on the address tokens stay stuck — check this before withdrawing from an exchange.
Freeze
Tether and Circle can freeze an address by their own decision — on Ethereum this happens regularly. Frozen USDT stays visible on the balance but does not move. Nobody can freeze ETH.
Fakes
Anyone can issue a token named USDT. The real one is only by contract address: for USDT that is 0xdAC17F958D2ee523a2206206994597C13D831ec7. Mitilena shows the contract on the token card.
How we do it

What Mitilena can do on Ethereum

Send and receive ETH and USDT
ETH and ERC-20 tokens, one 0x… address for all EVM networks
Gas price slider, gas estimate for tokens
Replace a stuck transaction with the same nonce
Signing screen shows the operation type: transfer, contract call, approval
WalletConnect: connect to DeFi and NFT sites
Offline signing of ETH and tokens on a card and in Mitilena Air
Swap ETH and tokens inside the wallet
Hand off to Mitilena Air by sound — no cable or USB: the online phone plays the transaction, the offline one listens, signs, and replies
Mitilena NFC card
For larger amounts
Offline ETH signing on an NFC card
The key is born on a device with no internet and lives on the card. The transaction goes to the offline phone by sound or QR — no cable, USB, or internet.
Ultimate · €369
FAQ

What people ask about Ethereum

What is the Ethereum fee right now?

It depends on the gas price at send time: from cents at night to tens of dollars at peak. Mitilena shows the live price and the total in money before you sign.

Why won’t USDT ERC-20 send?

Most likely the address has no ETH for gas. Tokens do not pay for themselves — the fee is taken in ETH. Buy a little ETH with a swap inside the wallet.

ERC-20 or TRC-20 — which USDT to choose?

For cheaper transfers, TRC-20 (Tron) and TON. ERC-20 — when you need Ethereum liquidity: DeFi, large amounts, venues that only take Ethereum. Mitilena has both.

What is gas in plain words?

A fee for the network’s computation. An ETH transfer costs 21,000 gas units, a token transfer costs more; the unit price in gwei moves with demand. Total = gas × price.

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