Custody Choices Between Exchange and Wallet: What Changes After a New Phone on OKX

Replacing a phone is one of the most common moments when account security quietly breaks. Authenticator entries, saved logins and notification settings do not always move cleanly. This guide looks at custody choices between exchange and wallet on OKX from the angle of a device change, in Australia, so the switch happens on your schedule rather than in an emergency. Custody is about who can move your assets and what happens if something goes wrong, which makes it worth deciding deliberately rather than by default.

Taking on self-custody responsibilities

A personal wallet gives you direct control of the keys, which removes dependence on a platform but places all responsibility on you. Losing the recovery phrase can mean losing the funds permanently, and nobody can reset it. Self-custody suits people who are prepared to store backups carefully and learn how the wallet works.

Custody arrangements should be reviewed when your circumstances change: larger balances, new devices, moving house or changes in family situation. Write down where funds are held, how each place is secured and where backups are kept, and update the note after every change.

Before the old phone is wiped

Keep the old phone working until the new one has passed every test. Sign in on the new device, confirm that approvals and authentication codes work, and only then remove the old device from the session list. Wiping first and fixing later is how many people end up in slow recovery processes they could have avoided.

Some exchanges offer additional custody-related controls, such as withdrawal allowlists, time delays or sub-accounts with limited permissions. These do not turn exchange custody into self-custody, but they make an account harder to drain if credentials are stolen. Check which controls the OKX app offers.

Reviewing the arrangement over time

Many people split funds by purpose: a working amount on the exchange for trading and the rest in storage they control. The split should reflect how often you actually trade. Moving everything back and forth frequently adds network costs and more chances for mistakes, so choose a rhythm you can maintain.

Hardware wallets keep keys on a dedicated device and require physical confirmation for transactions. Buy them only from the manufacturer or an authorised retailer, set them up yourself and never use a device that arrives with a recovery phrase already printed or configured.

First checks on the new device

Once the new phone is in use, open the security area of your OKX account and read the device and session list line by line. Remove entries you do not recognise or no longer use. Check that notifications still arrive, because a silent account is harder to monitor than a noisy one.

Risk boundary: OKX Australia Guide

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Scenario checkpoint

• Rehearse restoring a personal wallet from its recovery phrase with a small amount first.
• Decide deliberately how much to keep on the exchange based on how often you actually trade.
• Buy hardware wallets only from the manufacturer or an authorised retailer and set them up yourself.
• Keep a written note of where funds are held and how each place is secured.
• Keep the old device working until sign-in, approvals and notifications are confirmed on the new one, then remove it from the session list.