How to Top Up With Crypto: USDC or SOL on the Solana Network

Paying with crypto is useful if you'd rather not use a card, or if you already hold stablecoins. Noir SMS accepts two assets on one network: USDC and SOL on Solana. Solana transactions are fast and cheap, but crypto payments are unforgiving of mistakes, especially picking the wrong network. This guide walks through the process step by step, explains the difference between paying from a self-custody wallet and from an exchange, and covers fees, timing and what to do if something looks wrong.

What can you pay with?

Noir SMS accepts USDC and SOL, both on the Solana network only. The minimum crypto top-up is $5. Payments go directly to the Noir SMS wallet address shown in your dashboard and are credited to your balance automatically. The same top-up bonuses apply as for card payments: +5% from $20, +10% from $50 and +15% from $100. Your balance never expires.

USDC is a stablecoin designed to track the US dollar, which makes it easy to send a precise dollar amount. SOL is Solana's native token, and its dollar value moves with the market, so the top-up screen's figures are what count.

Why does the network matter so much?

USDC exists on many blockchains, including Ethereum, Base, Polygon and others, and exchanges often let you choose which one to withdraw on. Noir SMS only receives on Solana. If you send USDC on a different chain to a Solana address, the payment won't arrive as expected and may not be recoverable.

When withdrawing from an exchange, select Solana (sometimes shown as SOL or SPL) as the network for both USDC and SOL. When using a wallet app, make sure you're on Solana and sending the Solana version of USDC.

Wallet or exchange: which should you send from?

A self-custody wallet such as Phantom or Solflare sends directly from your own address. You control the exact amount and the transaction usually confirms in seconds. To send USDC from a wallet, you need a small amount of SOL in the same wallet to pay the network fee.

An exchange like Coinbase or Kraken can also withdraw USDC or SOL on Solana, assuming it supports that network for your account and region. Exchanges charge a withdrawal fee, and some deduct it from the amount you enter, so the amount that arrives may be lower than you typed. Check the exchange's withdrawal screen for the final received amount. Exchanges may also hold withdrawals for security checks, which can add minutes or more.

• Wallet: fastest, exact amount, needs a little SOL for fees.
• Exchange: convenient if your funds are there; watch fee deductions and delays.
• Either way: Solana network only, and double-check the address.

Step by step

1. Open the crypto top-upIn the dashboard, choose to add funds with USDC or SOL.
2. Check the amount and addressNote the amount and the Solana address the top-up screen shows.
3. Select the Solana networkIn your wallet or exchange, choose Solana for USDC or SOL.
4. Send and confirmPaste the address, check it, account for any exchange fee and send.
5. Wait for automatic creditYour balance updates automatically once the transaction confirms.

How long does it take?

Solana transactions typically confirm within seconds. Once confirmed, Noir SMS credits your balance automatically. Most top-ups from a wallet show up within a few minutes. Exchange withdrawals depend on the exchange's processing time before the transaction is even broadcast.

If your balance hasn't updated after a reasonable wait, find the transaction signature (the Solana transaction ID) in your wallet or exchange history and look it up on a Solana block explorer to confirm it went to the right address on the right network. Then contact support@noirsms.com or the Support page with the signature, the amount and the time.

Common mistakes to avoid

Most crypto payment problems come from a handful of avoidable errors. Take a moment before you press send.

• Sending on the wrong network, such as Ethereum or Base instead of Solana.
• Sending less than the $5 minimum, or less than the top-up screen asked for after exchange fees.
• Copying the address incorrectly; always paste, then check the first and last characters.
• Sending a token other than USDC or SOL.
• Running out of SOL for fees when sending USDC from a wallet.

What can you use the balance for?

Your balance pays for numbers to verify your own legitimate accounts, one verification on one service per number. Paying with crypto doesn't change the rules: Noir SMS isn't for bank, fintech, crypto-exchange or identity (KYC) verification, or for fraud, spam or bulk account creation. If a number doesn't receive a code within 20 minutes, the charge goes back to your balance automatically.