Kenya's Equity Bank aims to double profits from its foreign markets in east Africa and increase users of its mobile banking service to boost earnings, its chief executive said on Tuesday. The lender, which has the highest number of depositors in east Africa, posted a 12 percent jump in pretax profit to 12.1 billion shillings in the first half, thanks to growth in commissions, foreign exchange trading and the contribution of its foreign subsidiaries in the region.