Short for デコレーション携帯電話 (dekorēshon keitai denwa).

colorful

not ... at all

even if ...,...cannot

very, exceedingly, awfully / (before a negative form) not at all, at all, by no means

to bedazzle (decorate with sequins)

individuality, individual personality, originality

(formal) Female third-person singular pronoun; she, her, girlfriend

(colloquial) a girlfriend (a female partner in a romantic relationship)

(literary) they (about women or girls)