The timing of the following announcement is a little shocking, with Nokia’s worldwide conference — Nokia World — set to kick off tomorrow, but it does seem to indicate that the world’s top handset OEM is not going to settle for business as usual any longer. Today, Nokia announced that Anssi Vajoki — the company’s head of mobile solutions — will resign, effective in six months. Vajoki has been with Nokia since 1991 and has been in his current role since 2008. The move comes just days after the replacement of current CEO Olli-Pekka Kallasvuo with former Microsoft executive Stephen Elop. Nokia’s chairman, Jorma Ollila, said that he too would step down once the CEO transition was complete.