▁user ▁will ▁be ▁directed ▁to ▁an ▁S MS ▁application ▁to ▁message ▁the ▁advert iser . ▁ ▁Image ▁text ▁and ▁b anner ▁ad s : ▁A ▁click ▁opens ▁your ▁browser ▁and ▁re - direct s ▁you ▁to ▁a ▁page ▁ ▁P ush ▁notification ▁ ▁Mobile ▁rich ▁media ▁ ▁There ▁are ▁limitations ▁to ▁rich ▁media ▁on ▁mobile ▁because ▁all ▁of ▁the ▁coding ▁must ▁be ▁done ▁in ▁HTML 5 , ▁since ▁iOS ▁does ▁not ▁support ▁flash . ▁ ▁Hand sets ▁display ▁and ▁corresponding ▁ad ▁images ▁There ▁are ▁hundreds ▁of ▁hand sets ▁in ▁the ▁market ▁and ▁they ▁differ ▁by ▁screen ▁size ▁and ▁supported ▁techn ologies ▁( e . g . ▁M MS , ▁W AP ▁ 2 . 0 ). ▁For ▁color ▁images , ▁formats ▁such ▁as ▁P NG , ▁J PE G , ▁G IF ▁and ▁B MP ▁are ▁typically ▁supported , ▁along ▁with ▁the ▁mon och rome ▁W B MP ▁format . ▁The ▁following ▁gives ▁an ▁over view ▁of ▁various ▁hand set ▁screen ▁sizes ▁and ▁a ▁recommended ▁image ▁size ▁for ▁each ▁type . ▁ ▁Source : ▁Mobile ▁Mark eting ▁Association ▁ ▁History ▁ ▁Martin ▁Cooper ▁invent ed ▁a ▁port able ▁hand set ▁in ▁ 1 9 7 3 , ▁when ▁he ▁was ▁a ▁project ▁manager ▁at ▁Motor ola . ▁It ▁was ▁almost ▁three ▁dec ades ▁after ▁the ▁idea ▁of ▁cell ular ▁communic ations ▁was ▁introduced ▁by ▁Bell ▁Labor ator ies . ▁Two ▁dec ades ▁later , ▁cell ular ▁ph ones ▁made ▁a ▁commercial ▁debut ▁in ▁the ▁mass ▁market ▁in ▁the ▁early ▁ 1 9 9