I made a mistake while salary negotiation.Actually for Hr Executive post they asked about my salary expectation over phone, I didn't have any idea about the company so I told 12k.Later in interview, I got to know that its a famous company of UAE. Also I have to handle recruitment and admin. work.Now I am thinking this salary is very low as per the company and my work profile. I have six months exp. I got my offer letter already. So now what can I do? Can I negotiate again over the salary?Pls advice...