Card purchases are funded by your Oobit balance by default, so most people add funds to Oobit first. If you'd rather keep your crypto in your own wallet, you can use WalletConnect instead.
Ways to add funds to Oobit
Deposit crypto from any external wallet or exchange. Tap Deposit in the app to get your address for each asset and network.
Buy crypto with a card inside the app. Oobit doesn't charge a fee for this.
Bank transfer deposit, where it's available in your country.
Fund card payments from your own wallet
With WalletConnect, you connect a wallet such as MetaMask or Trust Wallet and approve a spending limit. For each card purchase, the exact amount is taken from your wallet, and your funds stay there until then.
Supported networks: Tron, Arbitrum and other EVM networks, and Solana.
Fee: 1%, minimum $0.25 (Brazil: 1%, no minimum).
This feature is rolling out gradually, so you may not see it yet.
See How do I use WalletConnect to fund card payments from my own wallet? for setup steps.