Asslam o Alikum Experts:

mery walid sahab ko 3 4 din sy unkown number sy call aa rahi hai jis py koi number show nahi hota sirf unkown number likha aata hai. call cut jany ka bhi recent/missed call list main bhi show nahi hota. to iska kya hal hai. kya yeh number kisi agency wagera ka hosakta hai. baraye mehrbani help farmayen. shukria.