We have done the same work 3 days before too for the client from this forum, actually we did it to prove our worth with out getting paid, but after getting details the man never replied back, it is look like he did not opened his mail even, basic package for ethical mobile hacking is $599, you will get almost all the details from the mobile upto 5GB (includes contact, call history, messages whatsapp messages, whatsapp media & gallery upto 5GB). Definitely we recieve payment in advance and only start work.