The OKX referral code for this walkthrough is UNLOCK20. Type it into the Referral code (optional) box on the app's sign-up screen, or open https://www.okx.com/join/UNLOCK20 on your phone first so it is filled in for you. UNLOCK20 gives a confirmed 20% rebate on eligible trading fees. It works as an ongoing promo code for cheaper spot and futures trading, not a one-off cash sign-up bonus. You only get the rebate on trades placed through the order book, so this guide follows the whole route on a phone: installing the app, entering the code, making your first USDT deposit, moving funds to the right account and placing a limit order that actually earns the rebate.

What do you actually get from the OKX referral code UNLOCK20?

When you register with UNLOCK20, your account is tied to that code permanently. After that, whenever you pay an eligible trading fee on spot or futures, 20% of it comes back to you under the terms attached to the code. You pay the normal fee first and the rebate is credited afterwards.

Three things are worth knowing before you start:

• The link has to exist at registration. OKX's own help pages say referral relationships are only set up at sign-up and can't be added or changed afterwards. If the field is empty when you tap Sign up, that email and phone number won't ever get UNLOCK20.
• It is a fee rebate, not free money. Nobody deposits a fixed amount of USDT into your account just for entering the code. Any extra new-user rewards are separate OKX campaigns. They appear inside the app, have their own tasks and deadlines, and change over time.
• Shortcuts usually don't count. The big "Buy crypto" button, card purchases and Convert are easy to use, but they aren't the order-book trades the 20% rebate is designed around. The steps below show the alternative.

Before you install: is OKX available where you live?

OKX runs different legal entities in different regions, and your country of residence decides which one you sign up with, which products you see and which payment options are available. Some countries can't open accounts at all. In others, derivatives are limited or switched off. EU residents see disclosures under MiCA. Those are regulatory notices and say nothing about returns.

Practical rules:

• Choose the country you actually live in on the first screen. It has to match the ID you'll upload later.
• A VPN doesn't change your legal residence and doesn't get you past identity verification (KYC). Accounts with mismatched details tend to get frozen at exactly the wrong moment, usually when you try to withdraw.
• If you're in the United States, the product set and app may be different from the global OKX app. Follow whatever the app shows for your region and don't copy steps written for another market.

Step 1: Download the genuine OKX app

Fake exchange apps are a real problem, and they often turn up through search ads and social media posts.

1. Open the Apple App Store or Google Play directly. Don't install from a link in a chat message.
2. Search for "OKX" and check the publisher name and the number of reviews before tapping install. A clone usually has few reviews and a slightly different developer name.
3. If you're unsure, go to okx.com in your phone's browser and use the download button on the official site, which takes you to the right store listing.
4. Never install an APK file someone sends you on Telegram or WhatsApp.

Step 2: Get the referral code into the app (and check it before you submit)

There are two safe ways to do this. OKX's help center describes both.

Option A: link first, then the app

1. On your phone, open https://www.okx.com/join/UNLOCK20 in a private or incognito browser tab.
2. Complete registration on that page. The referral field should already show UNLOCK20.
3. Then install the app and log in with the same email.

This is the most reliable route. The code is attached on the web and the app just becomes the place where you use the account.

Option B: register directly in the app

1. Open the OKX app and tap Sign up.
2. Choose your Country/region, tick the box to accept the Terms of Service, Risk and Compliance Disclosure and Privacy Notice, then tap Create account.
3. On the next screen, enter your Email. On the same screen there's a box labelled Referral code (optional). Type UNLOCK20 in capital letters with no spaces.
4. Stop and read the field before tapping Sign up. Check that it says UNLOCK20 and not some other code.
5. Enter the email verification code, then add your phone number with the correct country prefix and confirm the SMS code. OKX asks for both an email and a phone number.

Why a different code sometimes appears in the field

OKX explains that if you clicked someone else's referral link or installed the app through a referral link in the last 30 days, that code can stay linked to your device and get prefilled. Clearing the browser cache or registering in a private window fixes this. If you see a code you don't recognise, don't submit. Close the screen and start again using Option A in a fresh private tab.

Step 3: Lock down the account before you deposit anything

Take five minutes for security now, while the balance is zero:

1. Turn on an authenticator app (Google Authenticator or similar) in the security settings. SMS-only protection is weaker.
2. Set an anti-phishing code. Real OKX emails will then include your personal phrase, and anything without it is fake.
3. Write down the backup or recovery details offline, not in a screenshot that syncs to the cloud.
4. Add a withdrawal address allowlist later, once you know which wallets you'll use.

Step 4: Complete identity verification (KYC)

Most features, including deposits above small limits and withdrawals, need verification. Usually you'll be asked for:

• A government photo ID (passport, national ID card or, in some countries, a driving licence)
• A live selfie or face scan inside the app
• Sometimes proof of address, depending on the entity and your limits

Most rejections come from glare on the ID, cut-off corners, a name that doesn't exactly match what you typed, or an expired document. Use daylight, a dark background and the original card, not a photocopy.

Step 5: Make your first on-chain USDT deposit without losing it

Many people in English-speaking markets fund OKX by sending USDT from another exchange or a self-custody wallet. This is the step where mistakes cost real money, so go slowly.

If you live in the EU or wider EEA, don't send USDT. Your account will be with OKX Europe, and under MiCA USDT can't be traded there. OKX's own Europe pages say deposited USDT can't be used for trading and can only be converted one way into USDC. Follow exactly the same steps below with USDC instead (or deposit euros by bank transfer if your account offers it), and use pairs such as BTC/USDC or BTC/EUR in Step 7.

Pick the network first, then copy the address

In the app, go to Assets, tap Deposit, search for USDT and choose a network. USDT exists on several chains, including Tron (TRC20), Ethereum (ERC20), Solana, TON and others that OKX lists. The network you choose on OKX must be the same network you choose when withdrawing from the sending platform. If they don't match, the transfer can end up stuck or lost.

About memos and tags

For the common USDT networks such as TRC20 or ERC20, OKX usually just shows an address. Some networks and assets do use a memo, tag or comment to credit the right account. TON-based transfers and coins like XRP or XLM are the usual examples. Rule of thumb: if OKX shows a memo on your deposit screen, it's required. Leaving it out is one of the most common reasons a deposit is received but not credited to you.

Send a small test first

1. Send a small amount, one you wouldn't mind waiting on, to the address you copied.
2. Watch the deposit history in the OKX app until it shows as completed. If you want to follow it on a block explorer, use the transaction hash (TxID) from the sending platform.
3. Once the test has arrived, send the rest using the same address, network and memo.

The test costs you one extra network fee. Compared with the risk of losing an entire deposit, that's a small price.

Step 6: Move USDT from Funding to Trading

This is where many new users get stuck: "My USDT arrived, but the trade screen says I have zero."

Deposits normally land in your Funding account. Spot and futures orders use the Trading account. Depending on your app version and account mode, the order screen might offer to move funds for you. If it doesn't:

1. Go to Assets and tap Transfer.
2. Set From: Funding and To: Trading.
3. Choose USDT, enter the amount (or tap Max) and confirm.

Transfers between your own accounts are internal and happen straight away. If your Trading balance still shows zero after a transfer, refresh the screen and check that you're logged into the main account and not a sub-account.

Step 7: Place your first spot limit order so the rebate applies

This is the step that matters for the 20% rebate.

Convert or "Buy crypto" vs the spot order book

Placing the limit order, tap by tap

1. Tap Trade at the bottom and make sure Spot is selected (not Convert, Futures or Margin).
2. Choose a pair, for example BTC/USDT or ETH/USDT.
3. Choose Limit as the order type.
4. Enter your price. If you set it slightly below the current price for a buy, your order waits in the book. When it fills, you usually pay the lower maker fee.
5. Enter the amount, or use the percentage slider to spend part of your Trading balance.
6. Check the summary, then tap Buy.
7. Your order appears under open orders until it fills. You can cancel it there at any time without paying a fee.

A market order fills immediately at the taker rate. That's fine, but on a small first trade the maker rate is worth having.

Step 8: Find the fees you actually paid

Don't assume. Check:

• Order history: open a filled order and look at the fee shown. It's usually charged in the coin you received.
• Account statement / bills: a line-by-line record of fees, transfers and rebates. This is where you can match the fee you paid against the credit you got back.
• Your fee tier page: shows your current maker and taker rates. If they differ from the table below, your entity or region uses a different schedule.

How much does 20% save? Worked example in Australian dollars

OKX's regular-user fees from its published fee pages are as follows. Your region may differ, so check your own fee page.

Example: you live in Australia and plan to put roughly AUD 3,000 a month into crypto, buying BTC with USDT on the spot market. For easy maths, assume 1 USDT ≈ AUD 1.50 (an illustrative rate only; check today's price). AUD 3,000 is then about 2,000 USDT of spot buying a month.

That's roughly AUD 0.48–0.60 a month at that size. It isn't life-changing for a small buyer, and it shouldn't be sold as if it were. The rebate grows in proportion to your volume, though. Someone trading 20,000 USDT a month at taker rates pays 20 USDT in fees and gets 4 USDT back, and active futures traders see the difference sooner. Habits matter even more. Using limit orders on the order book instead of Convert usually saves more on spread than the rebate does, and UNLOCK20 adds to that saving.

Common first-week problems and what to do

Residency and restrictions note

OKX's availability, legal entity and product list depend on where you live, and they change. Some jurisdictions are fully restricted and some have limited products, especially derivatives. Always register with your real country, complete KYC with your own documents, and read the terms the app shows you for your region. A VPN doesn't replace KYC and can lead to an account being restricted.

FAQ: OKX referral code, promo code and sign-up bonus

What is the OKX referral code in this guide?

UNLOCK20. Enter it in Referral code (optional) when you register, or sign up through the join link so it's filled in automatically.

Is UNLOCK20 a promo code or a referral code?

Both names get used. OKX's form calls it a referral code, and many people search for "OKX promo code". In practice it's a single code entered at sign-up that gives a 20% rebate on eligible trading fees.

Is there an OKX sign-up bonus with UNLOCK20?

The confirmed benefit is the 20% fee rebate. OKX also runs new-user campaigns, and accounts registered through a referral take part in them automatically, but their rewards, tasks and availability change and depend on your region. Check what the app shows you after registration rather than trusting screenshots from other countries.

I already registered without a code. Can I add UNLOCK20 now?

No. OKX states that referral codes can't be added or changed after the account is created. Don't open a second account with the same identity, because that breaks the terms.

Do Convert trades get the 20% rebate?

Generally no. Convert prices include a spread rather than the order-book trading fee the rebate is based on. Use Trade → Spot for purchases where you want the rebate.

Which USDT network should I use for my first deposit?

Use one that both the sending platform and OKX support, with a withdrawal fee you're happy with. The essential part is that the network matches on both sides and that you include a memo if OKX shows one.

Why does my first trade say insufficient funds?

Your deposit is in the Funding account. Use Assets → Transfer to move it to Trading.

Does the rebate apply to futures too?

Eligible futures fees are included. But leverage can wipe out a small account quickly. Get comfortable with spot first.

Short risk note

Crypto prices can drop sharply, and exchanges carry platform, regulatory and operational risk. A fee rebate lowers your costs. It doesn't protect you against losses. Only deposit what you can afford to lose, avoid leverage until you understand liquidation, and keep long-term holdings in custody you control if that suits you. This guide is general information, not financial advice.

Your first-session checklist

1. Install the genuine app from the official store.
2. Register through the join link, or type UNLOCK20 into Referral code (optional), and check the field before you tap Sign up.
3. Turn on an authenticator app and an anti-phishing code.
4. Complete KYC with your real details.
5. Deposit USDT on a matching network, with a memo if one is shown, and send a test first.
6. Transfer Funding → Trading.
7. Buy with a Spot limit order, not Convert.
8. Check the fee in your order details and the rebate in your account statement.

Do these eight steps once and the rest of your time on OKX runs on the same routine.