This is the totally Fraud System. If you ask about your project understanding to them, first they will insists to pay you and once you pay they will run away. So, better to ask them about your requirement understating first. Also, all of them belongs to Kenya and private numbers of Kenya, and they will tell you they have by passed the number to save taxes. Lol. Beware all innocent students and don't trap into this kind of system. Better you go with any trusted application like Peopleperhour.com or fiverr.com