Take context from the input text and decide on the accurate relationship between 'Mobily' and 'Saudi Arabia' from the options provided.
Options: position held, brand, headquarters location, operator

Abu Dhabi inched up 0.1 percent, although heavyweight telecommunications firm Etisalat fell 1.4 percent after posting a 40-percent drop in second-quarter profit, citing its Saudi Arabia affiliate Mobily and currency losses.
headquarters location