Testnet Account
How to add a wallet in the testnet?
Before using a wallet on the testnet, you need to create it on the mainnet first.
Then select 'Add Wallet' > 'Testnet Account', and enter the 24 secret words of your wallet.
How to receive testnet coins (TON)?
You can get test coins in the @testgiver_ton_bot.
How to send TON (or tokens) from the test network to the main network?
The testnet and mainnet are like two parallel blockchains. For this reason, it's impossible to transfer TON or tokens from the testnet to the mainnet.