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The cheapest and safest way to buy U (USDT, Tether) can be followed through the following steps:
Choose an exchange: First, select a reputable large exchange for trading. Large exchanges usually offer more trading pairs and lower trading fees, while their security is also relatively high.
Registration and certification: Complete the registration at the exchange and undergo the necessary identity verification (KYC) process. While this increases the complexity of trading, it helps reduce the risk of being frozen.