i am kulvinder singh arora s/o late shri harnam singh r/o c 43 a kalka ji new delhi 110019 though this letter i want to drar your attemtion towards my cell phone last night i was in kalkaji ji krishna market for some urgent piece of work and after 1 hour i have realise that my phone is miss place somewhere in which i was using my business no. which is ********17 from airtel operator i want to block this number as wel as want to atke a new duplicate sim for future connectivity with my relatives.