How to setup Testnet wallet

Tonkeeper\

Go to the settings menu, tap the logo at the bottom of the screen five times, then switch Dev Mode to “ON.”

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Go back to the main screen, select “Add Wallet,” and then choose “Testnet Account” to add a testnet wallet. You'll need to re-enter your seed phrase.

MyTonWallet

Go to the settings menu, tap the logo at the bottom of the screen five times, then switch Network to “Testnet”. You'll need to re-enter your seed phrase or create a new wallet.

Tonhub

Go to the “More” menu, tap the logo at the bottom of the screen five times, then switch Network to “Testnet.”