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Tronlink wallet 300 free coins this can be converted to Bitcoin in future.
Go to your play store or apple store download Tronlink wallet, sign up after your registration go to the down of the application you will see me (me) click on it, you will find friend invitation click on it then go to claim reward by the right up of the wallet.
Enter the invitation code 57F7 you will be credited with 300 coins which can be converted in future and you will generate your invitation code also.
I did register but I don't understand how it works