write an application to the principal of your school requesting to get back your mobile

The Principal,
school name
address
date,month,year


Sir.
    l beg to state that my mobile hee been taken away by the prefect of the school. i am extremely sorry that i brought the mobile in spite of the
ban to bring it. I assure you that i will not do anything that is against the decorum and name of the so.
    Kindly instruct the prefect to give me In. Once again i regret the lapse on my Part.

                            Yours obediently
                              your name
                            Class X, Section x