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You can still freeze and earn some passive income, the process is simple and doesn't have a minimum amount.... All you have to do is stake and vote for SRs.

You can check @engrsayful post on how to vote to Super Representatives with your Staked TRX

Whenever I try to stake my tron, they will ask me to create a cold wallet. please what's the cause?

Do you use the mobile wallet or the web?

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