In order to mint your unique Callsign, you must have SHRAP in your Inventory (Shrapnel Wallet) and that Callsign must meet the requirements and be available to mint from shrapnel.com/callsign
How to mint a callsign?
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In order to mint your unique Callsign, you must have SHRAP in your Inventory (Shrapnel Wallet) and that Callsign must meet the requirements and be available to mint from shrapnel.com/callsign