Astrea 7 bonds

This is my first time applying for bonds IPO. What are the fees involved when selling this bond on the secondary market. The mandatory call is in 5 years while the maturity date is in 10 years, does it mean the bond can either mature in 5 years or 10 years? There is a one-time 1% step-up in interest rate, does it mean the bond will yield additional 1% pa from the 5th year onwards?

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