31st January 2014 From India, Ahmadabad
Decide first if you really want to rejoin & all your concerns with current company are killed (if salary was not only reason to leave the company)
if above answer is yes then response given by saji is appropriate.
if above answer is no then you can call new company & tell them truth the may match up with your new salary
after all choice is yours
31st January 2014 From India, Mumbai